diff --git a/package.json b/package.json
index 3e26c24..4cd4e57 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   },
   "devDependencies": {
     "jasmine-reporters": "2.2.1",
-    "node-sass": "^4.11.0",
+    "node-sass": "4.13.1",
     "react-scripts-ts": "2.8.0",
     "tslint": "5.9.1"
   }
diff --git a/yarn.lock b/yarn.lock
index 0e72046..bc494c8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4112,7 +4112,7 @@ node-pre-gyp@^0.6.36:
     tar "^2.2.1"
     tar-pack "^3.4.0"
 
-node-sass@^4.11.0:
+node-sass@4.13.1:
   version "4.13.1"
   resolved "https://registry.yarnpkg.com/node-sass/-/node-sass-4.13.1.tgz#9db5689696bb2eec2c32b98bfea4c7a2e992d0a3"
   integrity sha512-TTWFx+ZhyDx1Biiez2nB0L3YrCZ/8oHagaDalbuBSlqXgUPsdkUSzJsVxeDO9LtPB49+Fh3WQl3slABo6AotNw==