diff --git a/wasm/notebook/package.json b/wasm/notebook/package.json
index e0d9848154..b60985a028 100644
--- a/wasm/notebook/package.json
+++ b/wasm/notebook/package.json
@@ -4,7 +4,7 @@
     "description": "Bindings to the RustPython library for WebAssembly",
     "main": "index.js",
     "dependencies": {
-        "codemirror": "^5.42.0",
+        "codemirror": "^6.0.0",
         "file-loader": "^6.1.0",
         "katex": "^0.16.4",
         "local-echo": "^0.2.0",