diff --git a/package.json b/package.json
index 2bafc70b..418c3475 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
   "dependencies": {
     "archiver": "1.2.x",
     "clean-webpack-plugin": "0.1.x",
-    "codemirror": "5.21.x",
+    "codemirror": "5.58.x",
     "css-loader": "0.14.x",
     "extract-text-webpack-plugin": "0.8.x",
     "fs-extra": "0.18.x",
diff --git a/yarn.lock b/yarn.lock
index 0b7c3c3d..d2556792 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -458,9 +458,9 @@ code-point-at@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/code-point-at/-/code-point-at-1.1.0.tgz#0d070b4d043a5bea33a2f1a40e2edb3d9a4ccf77"
 
-codemirror@5.21.x:
-  version "5.21.0"
-  resolved "https://registry.yarnpkg.com/codemirror/-/codemirror-5.21.0.tgz#9ec4caeda50807575b2115226bf12414f85d2246"
+codemirror@5.58.x:
+  version "5.58.2"
+  resolved "https://registry.yarnpkg.com/codemirror/-/codemirror-5.58.2.tgz#ed54a1796de1498688bea1cdd4e9eeb187565d1b"
 
 combined-stream@^1.0.5, combined-stream@~1.0.5:
   version "1.0.5"