diff --git a/CMakeLists.txt b/CMakeLists.txt
index ca1f90770..ba477ded8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -257,7 +257,7 @@ include(${CMAKE_CURRENT_SOURCE_DIR}/src/CMakeLists-local.txt) # Optional project
 ########################################################################
 # pkgconfig
 ########################################################################
-set (VERSION "4.0.0")
+set (VERSION "4.0.1")
 set (prefix "${CMAKE_INSTALL_PREFIX}")
 set (exec_prefix "\${prefix}")
 set (libdir "\${prefix}/lib${LIB_SUFFIX}")
diff --git a/NEWS b/NEWS
index 1d5085f70..2144cd040 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,7 @@
+CZMQ version 4.0.1 stable, released on 201x/xx/xx
+=================================================
+
+
 CZMQ version 4.0.0 stable, released on 2016/11/04
 =================================================
 
diff --git a/bindings/jni/README.md b/bindings/jni/README.md
index cfb8c8fe8..d41969436 100644
--- a/bindings/jni/README.md
+++ b/bindings/jni/README.md
@@ -49,7 +49,7 @@ Then in the android directory, run:
 This does the following:
 
 * It compiles the CZMQ C sources for Android, into a native library libczmq.so in builds/android/
-* It compiles the JNI Java classes into a jar file czmq-jni-4.0.0.jar in bindings/jni/build/libs
+* It compiles the JNI Java classes into a jar file czmq-jni-4.0.1.jar in bindings/jni/build/libs
 * It compiles the JNI C sources for Android, into a native library libczmqjni.so.
 * It combines all these into czmq-android.jar, which you can use in your Android projects.
 
diff --git a/bindings/jni/android/build.sh b/bindings/jni/android/build.sh
index 837e47c95..8177a021f 100755
--- a/bindings/jni/android/build.sh
+++ b/bindings/jni/android/build.sh
@@ -52,7 +52,7 @@ make $MAKE_OPTIONS
 
 echo "********  Building czmq.jar for Android"
 #   Copy class files into org/zeromq/etc.
-unzip -q ../../build/libs/czmq-jni-4.0.0.jar
+unzip -q ../../build/libs/czmq-jni-4.0.1.jar
 
 #   Copy native libraries into lib/armeabi
 mkdir -p lib/armeabi
diff --git a/bindings/jni/build.gradle b/bindings/jni/build.gradle
index 8315d165e..3f0aed878 100644
--- a/bindings/jni/build.gradle
+++ b/bindings/jni/build.gradle
@@ -8,11 +8,11 @@
 plugins {
     id 'java'
     id 'maven-publish'
-    id "com.jfrog.bintray" version "1.6"
+    id "com.jfrog.bintray" version "1.7.2"
 }
 
 group = "org.zeromq"
-version = "4.0.0"
+version = "4.0.1"
 
 repositories {
     mavenLocal()
@@ -135,8 +135,8 @@ bintray {
         vcsUrl = 'https://github.com/zeromq/czmq.git'
         githubRepo = System.getenv('BINTRAY_USER_ORG') + '/czmq'
         version {
-            name = '4.0.0'
-            vcsTag= '4.0.0'
+            name = '4.0.1'
+            vcsTag= '4.0.1'
         }
     }
 }
diff --git a/bindings/jni/msvc/resource.rc b/bindings/jni/msvc/resource.rc
index 29dbfa0ef..59e2972cc 100644
--- a/bindings/jni/msvc/resource.rc
+++ b/bindings/jni/msvc/resource.rc
@@ -49,8 +49,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 4,0,0,0
- PRODUCTVERSION 4,0,0,0
+ FILEVERSION 4,0,1,0
+ PRODUCTVERSION 4,0,1,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -67,12 +67,12 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "The AUTHORS"
             VALUE "FileDescription", "The high-level C binding for 0MQ"
-            VALUE "FileVersion", "4.0.0.0"
+            VALUE "FileVersion", "4.0.1.0"
             VALUE "InternalName", "CZMQ"
             VALUE "LegalCopyright", "Copyright (c) the Authors"
             VALUE "OriginalFilename", "libczmq.dll"
             VALUE "ProductName", "CZMQ"
-            VALUE "ProductVersion", "4.0.0.0"
+            VALUE "ProductVersion", "4.0.1.0"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/bindings/qt/buildlib/buildlib.pro b/bindings/qt/buildlib/buildlib.pro
index 23e765fc8..932717d8d 100644
--- a/bindings/qt/buildlib/buildlib.pro
+++ b/bindings/qt/buildlib/buildlib.pro
@@ -3,7 +3,7 @@
 #  Read the zproject/README.md for information about making permanent changes. #
 ################################################################################
 TEMPLATE = lib
-VERSION = 4.0.0
+VERSION = 4.0.1
 CONFIG += qt dll qczmq-buildlib
 mac:CONFIG += absolute_library_soname
 win32|mac:!wince*:!win32-msvc:!macx-xcode:CONFIG += debug_and_release build_all
diff --git a/bindings/ruby/lib/czmq/ffi/version.rb b/bindings/ruby/lib/czmq/ffi/version.rb
index fe6ae8953..76477e607 100644
--- a/bindings/ruby/lib/czmq/ffi/version.rb
+++ b/bindings/ruby/lib/czmq/ffi/version.rb
@@ -5,7 +5,7 @@
 
 module CZMQ
   module FFI
-    VERSION = '4.0.0'
+    VERSION = '4.0.1'
   end
 end
 
diff --git a/builds/msvc/nuget/package.nuspec b/builds/msvc/nuget/package.nuspec
index 48b63de45..0e9c441a9 100644
--- a/builds/msvc/nuget/package.nuspec
+++ b/builds/msvc/nuget/package.nuspec
@@ -8,7 +8,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2013/01/nuspec.xsd">
     <metadata minClientVersion="2.5">
         <id>czmq_vc120</id>
-        <version>4.0.0.0</version>
+        <version>4.0.1.0</version>
         <title>czmq_vc120</title>
         <authors>See AUTHORS</authors>
         <owners>Eric Voskuil</owners>
@@ -36,52 +36,52 @@
 
         <!-- libraries -->
         <!-- x86 Dynamic libraries (.dll) -->
-        <file src="..\..\..\bin\Win32\Release\v120\dynamic\czmq.dll" target="build\native\bin\czmq-x86-v120-mt-4_0_0_0.dll" />
-        <file src="..\..\..\bin\Win32\Debug\v120\dynamic\czmq.dll" target="build\native\bin\czmq-x86-v120-mt-gd-4_0_0_0.dll" />
+        <file src="..\..\..\bin\Win32\Release\v120\dynamic\czmq.dll" target="build\native\bin\czmq-x86-v120-mt-4_0_1_0.dll" />
+        <file src="..\..\..\bin\Win32\Debug\v120\dynamic\czmq.dll" target="build\native\bin\czmq-x86-v120-mt-gd-4_0_1_0.dll" />
 
         <!-- x86 Debugging symbols (.pdb) -->
-        <!--<file src="..\..\..\bin\Win32\Release\v120\dynamic\czmq.pdb" target="build\native\bin\czmq-x86-v120-mt-4_0_0_0.pdb" />-->
-        <file src="..\..\..\bin\Win32\Debug\v120\dynamic\czmq.pdb" target="build\native\bin\czmq-x86-v120-mt-gd-4_0_0_0.pdb" />
+        <!--<file src="..\..\..\bin\Win32\Release\v120\dynamic\czmq.pdb" target="build\native\bin\czmq-x86-v120-mt-4_0_1_0.pdb" />-->
+        <file src="..\..\..\bin\Win32\Debug\v120\dynamic\czmq.pdb" target="build\native\bin\czmq-x86-v120-mt-gd-4_0_1_0.pdb" />
 
         <!-- x86 Import libraries (.imp.lib) -->
-        <file src="..\..\..\bin\Win32\Release\v120\dynamic\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-4_0_0_0.imp.lib" />
-        <file src="..\..\..\bin\Win32\Debug\v120\dynamic\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-gd-4_0_0_0.imp.lib" />
+        <file src="..\..\..\bin\Win32\Release\v120\dynamic\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-4_0_1_0.imp.lib" />
+        <file src="..\..\..\bin\Win32\Debug\v120\dynamic\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-gd-4_0_1_0.imp.lib" />
 
         <!-- x86 Export libraries (.exp) -->
-        <file src="..\..\..\bin\Win32\Release\v120\dynamic\czmq.exp" target="build\native\bin\czmq-x86-v120-mt-4_0_0_0.exp" />
-        <file src="..\..\..\bin\Win32\Debug\v120\dynamic\czmq.exp" target="build\native\bin\czmq-x86-v120-mt-gd-4_0_0_0.exp" />
+        <file src="..\..\..\bin\Win32\Release\v120\dynamic\czmq.exp" target="build\native\bin\czmq-x86-v120-mt-4_0_1_0.exp" />
+        <file src="..\..\..\bin\Win32\Debug\v120\dynamic\czmq.exp" target="build\native\bin\czmq-x86-v120-mt-gd-4_0_1_0.exp" />
 
         <!-- x86 Static libraries (.lib) -->
-        <file src="..\..\..\bin\Win32\Release\v120\static\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-s-4_0_0_0.lib" />
-        <file src="..\..\..\bin\Win32\Debug\v120\static\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-sgd-4_0_0_0.lib" />
+        <file src="..\..\..\bin\Win32\Release\v120\static\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-s-4_0_1_0.lib" />
+        <file src="..\..\..\bin\Win32\Debug\v120\static\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-sgd-4_0_1_0.lib" />
 
         <!-- x86 Static link time code generation libraries (.ltcg.lib) -->
-        <file src="..\..\..\bin\Win32\Release\v120\ltcg\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-s-4_0_0_0.ltcg.lib" />
-        <file src="..\..\..\bin\Win32\Debug\v120\ltcg\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-sgd-4_0_0_0.ltcg.lib" />
+        <file src="..\..\..\bin\Win32\Release\v120\ltcg\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-s-4_0_1_0.ltcg.lib" />
+        <file src="..\..\..\bin\Win32\Debug\v120\ltcg\czmq.lib" target="build\native\bin\czmq-x86-v120-mt-sgd-4_0_1_0.ltcg.lib" />
 
         <!-- x64 Dynamic libraries (.dll) -->
-        <file src="..\..\..\bin\x64\Release\v120\dynamic\czmq.dll" target="build\native\bin\czmq-x64-v120-mt-4_0_0_0.dll" />
-        <file src="..\..\..\bin\x64\Debug\v120\dynamic\czmq.dll" target="build\native\bin\czmq-x64-v120-mt-gd-4_0_0_0.dll" />
+        <file src="..\..\..\bin\x64\Release\v120\dynamic\czmq.dll" target="build\native\bin\czmq-x64-v120-mt-4_0_1_0.dll" />
+        <file src="..\..\..\bin\x64\Debug\v120\dynamic\czmq.dll" target="build\native\bin\czmq-x64-v120-mt-gd-4_0_1_0.dll" />
 
         <!-- x64 Debugging symbols (.pdb) -->
-        <!--<file src="..\..\..\bin\x64\Release\v120\dynamic\czmq.pdb" target="build\native\bin\czmq-x64-v120-mt-4_0_0_0.pdb" />-->
-        <file src="..\..\..\bin\x64\Debug\v120\dynamic\czmq.pdb" target="build\native\bin\czmq-x64-v120-mt-gd-4_0_0_0.pdb" />
+        <!--<file src="..\..\..\bin\x64\Release\v120\dynamic\czmq.pdb" target="build\native\bin\czmq-x64-v120-mt-4_0_1_0.pdb" />-->
+        <file src="..\..\..\bin\x64\Debug\v120\dynamic\czmq.pdb" target="build\native\bin\czmq-x64-v120-mt-gd-4_0_1_0.pdb" />
 
         <!-- x64 Import libraries (.imp.lib) -->
-        <file src="..\..\..\bin\x64\Release\v120\dynamic\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-4_0_0_0.imp.lib" />
-        <file src="..\..\..\bin\x64\Debug\v120\dynamic\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-gd-4_0_0_0.imp.lib" />
+        <file src="..\..\..\bin\x64\Release\v120\dynamic\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-4_0_1_0.imp.lib" />
+        <file src="..\..\..\bin\x64\Debug\v120\dynamic\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-gd-4_0_1_0.imp.lib" />
 
         <!-- x64 Export libraries (.exp) -->
-        <file src="..\..\..\bin\x64\Release\v120\dynamic\czmq.exp" target="build\native\bin\czmq-x64-v120-mt-4_0_0_0.exp" />
-        <file src="..\..\..\bin\x64\Debug\v120\dynamic\czmq.exp" target="build\native\bin\czmq-x64-v120-mt-gd-4_0_0_0.exp" />
+        <file src="..\..\..\bin\x64\Release\v120\dynamic\czmq.exp" target="build\native\bin\czmq-x64-v120-mt-4_0_1_0.exp" />
+        <file src="..\..\..\bin\x64\Debug\v120\dynamic\czmq.exp" target="build\native\bin\czmq-x64-v120-mt-gd-4_0_1_0.exp" />
 
         <!-- x64 Static libraries (.lib) -->
-        <file src="..\..\..\bin\x64\Release\v120\static\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-s-4_0_0_0.lib" />
-        <file src="..\..\..\bin\x64\Debug\v120\static\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-sgd-4_0_0_0.lib" />
+        <file src="..\..\..\bin\x64\Release\v120\static\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-s-4_0_1_0.lib" />
+        <file src="..\..\..\bin\x64\Debug\v120\static\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-sgd-4_0_1_0.lib" />
 
         <!-- x64 Static link time code generation libraries (.ltcg.lib) -->
-        <file src="..\..\..\bin\Win32\Release\v120\ltcg\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-s-4_0_0_0.ltcg.lib" />
-        <file src="..\..\..\bin\Win32\Debug\v120\ltcg\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-sgd-4_0_0_0.ltcg.lib" />
+        <file src="..\..\..\bin\Win32\Release\v120\ltcg\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-s-4_0_1_0.ltcg.lib" />
+        <file src="..\..\..\bin\Win32\Debug\v120\ltcg\czmq.lib" target="build\native\bin\czmq-x64-v120-mt-sgd-4_0_1_0.ltcg.lib" />
     </files>
 <!--
 ################################################################################
diff --git a/builds/msvc/nuget/package.targets b/builds/msvc/nuget/package.targets
index 0a1ef504b..23d38adad 100644
--- a/builds/msvc/nuget/package.targets
+++ b/builds/msvc/nuget/package.targets
@@ -30,66 +30,66 @@
   <!-- static libraries -->
   <ItemDefinitionGroup Condition="'$(Platform)' == 'Win32' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'static' And $(Configuration.IndexOf('Release')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x86-v120-mt-s-4_0_0_0.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x86-v120-mt-s-4_0_1_0.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Platform)' == 'Win32' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'static' And $(Configuration.IndexOf('Debug')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x86-v120-mt-sgd-4_0_0_0.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x86-v120-mt-sgd-4_0_1_0.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Platform)' == 'x64' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'static' And $(Configuration.IndexOf('Release')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x64-v120-mt-s-4_0_0_0.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x64-v120-mt-s-4_0_1_0.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Platform)' == 'x64' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'static' And $(Configuration.IndexOf('Debug')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x64-v120-mt-sgd-4_0_0_0.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x64-v120-mt-sgd-4_0_1_0.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
 
   <!-- static ltcg libraries -->
   <ItemDefinitionGroup Condition="'$(Platform)' == 'Win32' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'ltcg' And $(Configuration.IndexOf('Release')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x86-v120-mt-s-4_0_0_0.ltcg.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x86-v120-mt-s-4_0_1_0.ltcg.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Platform)' == 'Win32' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'ltcg' And $(Configuration.IndexOf('Debug')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x86-v120-mt-sgd-4_0_0_0.ltcg.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x86-v120-mt-sgd-4_0_1_0.ltcg.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Platform)' == 'x64' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'ltcg' And $(Configuration.IndexOf('Release')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x64-v120-mt-s-4_0_0_0.ltcg.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x64-v120-mt-s-4_0_1_0.ltcg.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Platform)' == 'x64' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'ltcg' And $(Configuration.IndexOf('Debug')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x64-v120-mt-sgd-4_0_0_0.ltcg.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x64-v120-mt-sgd-4_0_1_0.ltcg.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
 
   <!-- dynamic import libraries -->
   <ItemDefinitionGroup Condition="'$(Platform)' == 'Win32' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'dynamic' And $(Configuration.IndexOf('Release')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x86-v120-mt-4_0_0_0.imp.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x86-v120-mt-4_0_1_0.imp.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Platform)' == 'Win32' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'dynamic' And $(Configuration.IndexOf('Debug')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x86-v120-mt-gd-4_0_0_0.imp.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x86-v120-mt-gd-4_0_1_0.imp.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Platform)' == 'x64' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'dynamic' And $(Configuration.IndexOf('Release')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x64-v120-mt-4_0_0_0.imp.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x64-v120-mt-4_0_1_0.imp.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Platform)' == 'x64' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'dynamic' And $(Configuration.IndexOf('Debug')) != -1">
     <Link>
-      <AdditionalDependencies>czmq-x64-v120-mt-gd-4_0_0_0.imp.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>czmq-x64-v120-mt-gd-4_0_1_0.imp.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
 
@@ -98,26 +98,26 @@
   <Target Name="czmq_AfterBuild_Win32_v120_Dynamic_Release"
           Condition="'$(Platform)' == 'Win32' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'dynamic' And $(Configuration.IndexOf('Release')) != -1"
           AfterTargets="czmq_AfterBuild">
-    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x86-v120-mt-4_0_0_0.dll" DestinationFiles="$(TargetDir)czmq.dll" SkipUnchangedFiles="true" />
-    <!--<Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x86-v120-mt-4_0_0_0.pdb" DestinationFiles="$(TargetDir)czmq.pdb" SkipUnchangedFiles="true" />-->
+    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x86-v120-mt-4_0_1_0.dll" DestinationFiles="$(TargetDir)czmq.dll" SkipUnchangedFiles="true" />
+    <!--<Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x86-v120-mt-4_0_1_0.pdb" DestinationFiles="$(TargetDir)czmq.pdb" SkipUnchangedFiles="true" />-->
   </Target>
   <Target Name="czmq_AfterBuild_Win32_v120_Dynamic_Debug"
           Condition="'$(Platform)' == 'Win32' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'dynamic' And $(Configuration.IndexOf('Debug')) != -1"
           AfterTargets="czmq_AfterBuild">
-    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x86-v120-mt-gd-4_0_0_0.dll" DestinationFiles="$(TargetDir)czmq.dll" SkipUnchangedFiles="true" />
-    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x86-v120-mt-gd-4_0_0_0.pdb" DestinationFiles="$(TargetDir)czmq.pdb" SkipUnchangedFiles="true" />
+    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x86-v120-mt-gd-4_0_1_0.dll" DestinationFiles="$(TargetDir)czmq.dll" SkipUnchangedFiles="true" />
+    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x86-v120-mt-gd-4_0_1_0.pdb" DestinationFiles="$(TargetDir)czmq.pdb" SkipUnchangedFiles="true" />
   </Target>
   <Target Name="czmq_AfterBuild_x64_v120_Dynamic_Release"
           Condition="'$(Platform)' == 'x64' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'dynamic' And $(Configuration.IndexOf('Release')) != -1"
           AfterTargets="czmq_AfterBuild">
-    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x64-v120-mt-4_0_0_0.dll" DestinationFiles="$(TargetDir)czmq.dll" SkipUnchangedFiles="true" />
-    <!--<Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x64-v120-mt-4_0_0_0.pdb" DestinationFiles="$(TargetDir)czmq.pdb" SkipUnchangedFiles="true" />-->
+    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x64-v120-mt-4_0_1_0.dll" DestinationFiles="$(TargetDir)czmq.dll" SkipUnchangedFiles="true" />
+    <!--<Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x64-v120-mt-4_0_1_0.pdb" DestinationFiles="$(TargetDir)czmq.pdb" SkipUnchangedFiles="true" />-->
   </Target>
   <Target Name="czmq_AfterBuild_x64_v120_Dynamic_Debug"
           Condition="'$(Platform)' == 'x64' And ('$(PlatformToolset)' == 'v120' Or '$(PlatformToolset)' == 'CTP_Nov2013') And '$(Linkage-czmq)' == 'dynamic' And $(Configuration.IndexOf('Debug')) != -1"
           AfterTargets="czmq_AfterBuild">
-    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x64-v120-mt-gd-4_0_0_0.dll" DestinationFiles="$(TargetDir)czmq.dll" SkipUnchangedFiles="true" />
-    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x64-v120-mt-gd-4_0_0_0.pdb" DestinationFiles="$(TargetDir)czmq.pdb" SkipUnchangedFiles="true" />
+    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x64-v120-mt-gd-4_0_1_0.dll" DestinationFiles="$(TargetDir)czmq.dll" SkipUnchangedFiles="true" />
+    <Copy SourceFiles="$(MSBuildThisFileDirectory)bin\czmq-x64-v120-mt-gd-4_0_1_0.pdb" DestinationFiles="$(TargetDir)czmq.pdb" SkipUnchangedFiles="true" />
   </Target>
 <!--
 ################################################################################
diff --git a/builds/msvc/resource.rc b/builds/msvc/resource.rc
index 29dbfa0ef..59e2972cc 100644
--- a/builds/msvc/resource.rc
+++ b/builds/msvc/resource.rc
@@ -49,8 +49,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 4,0,0,0
- PRODUCTVERSION 4,0,0,0
+ FILEVERSION 4,0,1,0
+ PRODUCTVERSION 4,0,1,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -67,12 +67,12 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "The AUTHORS"
             VALUE "FileDescription", "The high-level C binding for 0MQ"
-            VALUE "FileVersion", "4.0.0.0"
+            VALUE "FileVersion", "4.0.1.0"
             VALUE "InternalName", "CZMQ"
             VALUE "LegalCopyright", "Copyright (c) the Authors"
             VALUE "OriginalFilename", "libczmq.dll"
             VALUE "ProductName", "CZMQ"
-            VALUE "ProductVersion", "4.0.0.0"
+            VALUE "ProductVersion", "4.0.1.0"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/ci_deploy.sh b/ci_deploy.sh
index bdd2bbd42..1d0d74a16 100755
--- a/ci_deploy.sh
+++ b/ci_deploy.sh
@@ -22,8 +22,8 @@ if [ "$BUILD_TYPE" == "default" ]; then
     cd -
 elif [ "$BUILD_TYPE" == "bindings" ] && [ "$BINDING" == "jni" ]; then
     ( cd bindings/jni && TERM=dumb PKG_CONFIG_PATH=/tmp/lib/pkgconfig ./gradlew clean bintrayUpload )
-    cp bindings/jni/android/czmq-android.jar czmq-android-4.0.0.jar
-    export CZMQ_DEPLOYMENT=czmq-android-4.0.0.jar
+    cp bindings/jni/android/czmq-android.jar czmq-android-4.0.1.jar
+    export CZMQ_DEPLOYMENT=czmq-android-4.0.1.jar
 else
     export CZMQ_DEPLOYMENT=""
 fi
diff --git a/configure.ac b/configure.ac
index 45afe43db..b4ab1532d 100755
--- a/configure.ac
+++ b/configure.ac
@@ -7,7 +7,7 @@
 # Process this file with autoconf to produce a configure script.
 AC_PREREQ(2.61)
 #
-AC_INIT([czmq],[4.0.0],[zeromq-dev@lists.zeromq.org])
+AC_INIT([czmq],[4.0.1],[zeromq-dev@lists.zeromq.org])
 
 AC_CONFIG_AUX_DIR(config)
 AC_CONFIG_MACRO_DIR(config)
diff --git a/include/czmq_library.h b/include/czmq_library.h
index 6c0719241..8309e91da 100644
--- a/include/czmq_library.h
+++ b/include/czmq_library.h
@@ -28,7 +28,7 @@
 //  CZMQ version macros for compile-time API detection
 #define CZMQ_VERSION_MAJOR 4
 #define CZMQ_VERSION_MINOR 0
-#define CZMQ_VERSION_PATCH 0
+#define CZMQ_VERSION_PATCH 1
 
 #define CZMQ_MAKE_VERSION(major, minor, patch) \
     ((major) * 10000 + (minor) * 100 + (patch))
diff --git a/packaging/debian/changelog b/packaging/debian/changelog
index 204d68331..72f218e26 100644
--- a/packaging/debian/changelog
+++ b/packaging/debian/changelog
@@ -1,4 +1,4 @@
-czmq (4.0.0) UNRELEASED; urgency=low
+czmq (4.0.1) UNRELEASED; urgency=low
 
   * Initial packaging.
 
diff --git a/packaging/debian/czmq.dsc.obs b/packaging/debian/czmq.dsc.obs
index b88e4ea3d..c3cc18e29 100644
--- a/packaging/debian/czmq.dsc.obs
+++ b/packaging/debian/czmq.dsc.obs
@@ -1,7 +1,7 @@
 Format: 3.0 (quilt)
 Binary: czmq
 Source: czmq
-Version: 4.0.0
+Version: 4.0.1
 Maintainer: czmq Developers <zeromq-dev@lists.zeromq.org>
 Architecture: any
 Build-Depends: debhelper (>= 9),
diff --git a/packaging/redhat/czmq.spec b/packaging/redhat/czmq.spec
index 5411defe6..e8a450e5a 100644
--- a/packaging/redhat/czmq.spec
+++ b/packaging/redhat/czmq.spec
@@ -21,7 +21,7 @@
 %define DRAFTS no
 %endif
 Name:           czmq
-Version:        4.0.0
+Version:        4.0.1
 Release:        1
 Summary:        the high-level c binding for 0mq
 License:        MPLv2
diff --git a/project.xml b/project.xml
index d4b142e85..14abac354 100644
--- a/project.xml
+++ b/project.xml
@@ -8,7 +8,7 @@
     repository = "https://github.com/zeromq/czmq"
     >
     <include filename = "license.xml" />
-    <version major = "4" minor = "0" patch = "0" />
+    <version major = "4" minor = "0" patch = "1" />
     <use project = "libzmq" />
     <use project = "uuid" optional = "1" implied = "1" />
     <use project = "systemd" optional = "1" implied = "1" min_major = "200" />