diff --git a/package.json b/package.json
index 82ed40df3..87e21771e 100644
--- a/package.json
+++ b/package.json
@@ -151,7 +151,7 @@
     "style-loader": "^0.19.0",
     "webpack": "^3.10.0",
     "webpack-build-notifier": "^0.1.18",
-    "webpack-sources": "1.1.0"
+    "webpack-sources": "1.0.1"
   },
   "postinstall": "install-app-deps",
   "license": "MIT",
diff --git a/yarn.lock b/yarn.lock
index a77dfd923..4122d40ed 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7714,7 +7714,7 @@ source-map@0.1.31:
   dependencies:
     amdefine ">=0.0.4"
 
-source-map@0.5.x, source-map@^0.5.3, source-map@~0.5.0, source-map@~0.5.1:
+source-map@0.5.x, source-map@^0.5.3, source-map@~0.5.0, source-map@~0.5.1, source-map@~0.5.3:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
 
@@ -8570,7 +8570,14 @@ webpack-merge@^4.1.0:
   dependencies:
     lodash "^4.17.4"
 
-webpack-sources@1.1.0, webpack-sources@^1.0.1:
+webpack-sources@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-1.0.1.tgz#c7356436a4d13123be2e2426a05d1dad9cbe65cf"
+  dependencies:
+    source-list-map "^2.0.0"
+    source-map "~0.5.3"
+
+webpack-sources@^1.0.1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-1.1.0.tgz#a101ebae59d6507354d71d8013950a3a8b7a5a54"
   dependencies: