diff --git a/package.json b/package.json
index 3fe1fa9a..9a811354 100644
--- a/package.json
+++ b/package.json
@@ -143,7 +143,7 @@
     "parcel-bundler": "^1.12.4",
     "prettier": "^1.19.1",
     "sinon": "^17.0.1",
-    "source-map-support": "^0.5.12",
+    "source-map-support": "^0.5.21",
     "sourcegraph": "^25.7.0",
     "ts-node": "^8.10.2",
     "tslint": "^5.11.0",
diff --git a/yarn.lock b/yarn.lock
index 753f5573..85f82b3b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6657,10 +6657,10 @@ source-map-resolve@^0.5.0:
     source-map-url "^0.4.0"
     urix "^0.1.0"
 
-source-map-support@^0.5.12, source-map-support@^0.5.17, source-map-support@~0.5.12, source-map-support@~0.5.6:
-  version "0.5.19"
-  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.19.tgz#a98b62f86dcaf4f67399648c085291ab9e8fed61"
-  integrity sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==
+source-map-support@^0.5.17, source-map-support@^0.5.21, source-map-support@~0.5.12, source-map-support@~0.5.6:
+  version "0.5.21"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.21.tgz#04fe7c7f9e1ed2d662233c28cb2b35b9f63f6e4f"
+  integrity sha512-uBHU3L3czsIyYXKX88fdrGovxdSCoTGDRZ6SYXtSRxLZUzHg5P/66Ht6uoUlHu9EZod+inXhKo3qQgwXUT/y1w==
   dependencies:
     buffer-from "^1.0.0"
     source-map "^0.6.0"