diff --git a/packages/app/package.json b/packages/app/package.json
index bd58f67839c..bef4bd405e5 100644
--- a/packages/app/package.json
+++ b/packages/app/package.json
@@ -107,7 +107,7 @@
     "base64-loader": "^1.0.0",
     "browser-detect": "^0.2.28",
     "circular-json": "^0.4.0",
-    "codemirror": "^5.27.4",
+    "codemirror": "^6.0.0",
     "codesandbox-api": "0.0.32",
     "codesandbox-import-utils": "^2.2.2",
     "color": "^0.11.4",