diff --git a/types/webpack/package.json b/types/webpack/package.json
index 96c1491edd..59c231c54c 100644
--- a/types/webpack/package.json
+++ b/types/webpack/package.json
@@ -1,6 +1,6 @@
 {
     "private": true,
     "dependencies": {
-        "source-map": "^0.7.0"
+        "source-map": "^0.6.0"
     }
 }