diff --git a/lib/iev/termbase/cli/command.rb b/lib/iev/termbase/cli/command.rb
index f5f7f14..95aa9ae 100644
--- a/lib/iev/termbase/cli/command.rb
+++ b/lib/iev/termbase/cli/command.rb
@@ -83,6 +83,18 @@ def self.shared_option(name, methods:, **kwargs)
         default: false,
         methods: %i[xlsx2yaml db2yaml]
 
+      shared_option :debug_sources,
+        desc: "...",
+        type: :boolean,
+        default: false,
+        methods: %i[xlsx2yaml db2yaml]
+
+      shared_option :debug_relaton,
+        desc: "...",
+        type: :boolean,
+        default: false,
+        methods: %i[xlsx2yaml db2yaml]
+
       shared_option :profile,
         desc: "Generates profiler reports for this program, requires ruby-prof",
         type: :boolean,
diff --git a/lib/iev/termbase/relaton_db.rb b/lib/iev/termbase/relaton_db.rb
index 264a44f..8fe54e9 100644
--- a/lib/iev/termbase/relaton_db.rb
+++ b/lib/iev/termbase/relaton_db.rb
@@ -56,7 +56,7 @@ def capture_output_streams
         ensure
           $stdout = original_stdout
           $stderr = original_stderr
-          warn(fake_out.string) if fake_out.pos > 0
+          debug(:relaton, fake_out.string) if fake_out.pos > 0
         end
       end
     end
diff --git a/lib/iev/termbase/source_parser.rb b/lib/iev/termbase/source_parser.rb
index 93c9773..37768e8 100644
--- a/lib/iev/termbase/source_parser.rb
+++ b/lib/iev/termbase/source_parser.rb
@@ -106,7 +106,7 @@ def extract_source_ref(str)
           /Constitution de l’Union internationale des télécommunications (UIT)/
           "International Telecommunication Union (ITU) Constitution (Ed. 2015)"
         else
-          warn "Failed to parse source: '#{str}'"
+          debug :sources, "Failed to parse source: '#{str}'"
           str
         end