diff --git a/package-lock.json b/package-lock.json
index 7e502ca..3f1e33a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1187,10 +1187,10 @@
     "concat-with-sourcemaps": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/concat-with-sourcemaps/-/concat-with-sourcemaps-1.0.4.tgz",
-      "integrity": "sha1-9Vs74q60dgGxCi1SWcz7cP0vHdY=",
+      "integrity": "sha512-mzlh4cb5VYG79rDfntfUXFeDUm5va3umIneTWet/fut4mWb/LcRBPtXsyW4Ilyazgcuh9HB4sHI+jx/qXYJxrA==",
       "dev": true,
       "requires": {
-        "source-map": "0.5.7"
+        "source-map": "^0.5.1"
       }
     },
     "connect": {
diff --git a/yarn.lock b/yarn.lock
index c9748c6..9e26f2d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -759,10 +759,10 @@ concat-stream@^1.4.6, concat-stream@^1.4.7:
     typedarray "^0.0.6"
 
 concat-with-sourcemaps@^1.0.0:
-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/concat-with-sourcemaps/-/concat-with-sourcemaps-1.0.4.tgz#f55b3be2aeb47601b10a2d5259ccfb70fd2f1dd6"
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/concat-with-sourcemaps/-/concat-with-sourcemaps-1.1.0.tgz#d4ea93f05ae25790951b99e7b3b09e3908a4082e"
   dependencies:
-    source-map "^0.5.1"
+    source-map "^0.6.1"
 
 connect-history-api-fallback@^1:
   version "1.6.0"