diff --git a/functions/package-lock.json b/functions/package-lock.json
index ca282cd..c041a38 100644
--- a/functions/package-lock.json
+++ b/functions/package-lock.json
@@ -1527,9 +1527,9 @@
       }
     },
     "immer": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/immer/-/immer-5.0.1.tgz",
-      "integrity": "sha512-KFHV1ivrBmPCVRhjy9oBooypnPfJ876NTrWXMNoUhXFAaWWAViVqZ4l6HxPST52qcN82qqsR38/pCGYRWP5W7w=="
+      "version": "9.0.6",
+      "resolved": "https://registry.npmjs.org/immer/-/immer-9.0.6.tgz",
+      "integrity": "sha512-G95ivKpy+EvVAnAab4fVa4YGYn24J1SpEktnJX7JJ45Bd7xqME/SCplFzYFmTbrkwZbQ4xJK1xMTUYBkN6pWsQ=="
     },
     "imurmurhash": {
       "version": "0.1.4",
diff --git a/functions/package.json b/functions/package.json
index c0f7448..80a4309 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -23,7 +23,7 @@
     "firebase-admin": "^8.6.0",
     "firebase-functions": "^3.3.0",
     "geodist": "^0.2.1",
-    "immer": "^5.0.0",
+    "immer": "^9.0.6",
     "lodash": "^4.17.15",
     "random-words": "^1.1.0",
     "request-promise": "^4.2.4",