diff --git a/package-lock.json b/package-lock.json
index f0ca380..54e8d2f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -69,9 +69,9 @@
       }
     },
     "immer": {
-      "version": "3.1.3",
-      "resolved": "https://registry.npmjs.org/immer/-/immer-3.1.3.tgz",
-      "integrity": "sha512-HG5SXTXTTVy9lGNwS075cNhQoV375jHsIJO3UtMjuUWJOuwlMr0u42FlsKTJcppt5AzsFAsmj9r4kHvsSHh3hQ=="
+      "version": "9.0.6",
+      "resolved": "https://registry.npmjs.org/immer/-/immer-9.0.6.tgz",
+      "integrity": "sha512-G95ivKpy+EvVAnAab4fVa4YGYn24J1SpEktnJX7JJ45Bd7xqME/SCplFzYFmTbrkwZbQ4xJK1xMTUYBkN6pWsQ=="
     },
     "inflight": {
       "version": "1.0.6",
diff --git a/package.json b/package.json
index 8a7ccca..7f239b1 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   "author": "pancomputationalist@mailbox.org",
   "license": "ISC",
   "dependencies": {
-    "immer": "^3.1.3",
+    "immer": "^9.0.6",
     "rxjs": "^6.5.2"
   },
   "devDependencies": {