diff --git a/docs/index.html b/docs/index.html
index a70e0b4fe..6d99dd1f8 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -3,8 +3,8 @@
 <head>
   <meta charset="UTF-8">
   <title>codelyzer</title>
-  <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.20.2/codemirror.min.css">
-  <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.20.2/theme/material.min.css">
+  <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.59.0/codemirror.min.css">
+  <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.59.0/theme/material.min.css">
   <link rel="stylesheet" href="css/app.css">
   <link rel=icon href="favicon.png" type="image/png"><Paste>
 </head>
@@ -94,8 +94,8 @@ <h4 id="warnings-header">Loading linter...</h4>
       </p>
     </div>
   </section>
-  <script src="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.20.2/codemirror.min.js"></script>
-  <script src="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.20.2/mode/javascript/javascript.min.js"></script>
+  <script src="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.59.0/codemirror.min.js"></script>
+  <script src="//cdnjs.cloudflare.com/ajax/libs/codemirror/5.59.0/mode/javascript/javascript.min.js"></script>
   <script src="//cdn.ravenjs.com/3.7.0/raven.min.js"></script>
   <script src="dist/app.bundle.js"></script>
   <script>
diff --git a/docs/package.json b/docs/package.json
index 57d81f083..446875705 100644
--- a/docs/package.json
+++ b/docs/package.json
@@ -17,7 +17,7 @@
     "@angular/compiler": "8.2.11",
     "@angular/core": "8.2.11",
     "codelyzer": "5.2.2",
-    "codemirror": "5.51.0",
+    "codemirror": "5.59.1",
     "rxjs": "6.5.3",
     "tslint": "5.20.0",
     "typescript": "3.9.7",
