diff --git a/package-lock.json b/package-lock.json
index ca5dc27..686bccc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6158,9 +6158,9 @@
       "integrity": "sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg=="
     },
     "immer": {
-      "version": "6.0.9",
-      "resolved": "https://registry.npmjs.org/immer/-/immer-6.0.9.tgz",
-      "integrity": "sha512-SyCYnAuiRf67Lvk0VkwFvwtDoEiCMjeamnHvRfnVDyc7re1/rQrNxuL+jJ7lA3WvdC4uznrvbmm+clJ9+XXatg=="
+      "version": "9.0.6",
+      "resolved": "https://registry.npmjs.org/immer/-/immer-9.0.6.tgz",
+      "integrity": "sha512-G95ivKpy+EvVAnAab4fVa4YGYn24J1SpEktnJX7JJ45Bd7xqME/SCplFzYFmTbrkwZbQ4xJK1xMTUYBkN6pWsQ=="
     },
     "import-cwd": {
       "version": "2.1.0",
diff --git a/package.json b/package.json
index 1c957d6..585a285 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "homepage": "https://tjallingt.github.io/dots-and-boxes",
   "dependencies": {
     "gh-pages": "^2.2.0",
-    "immer": "^6.0.9",
+    "immer": "^9.0.6",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",
     "react-scripts": "3.0.1"