diff --git a/hearts-typescript-react/package-lock.json b/hearts-typescript-react/package-lock.json
index 4184fba8..2ff8bae8 100644
--- a/hearts-typescript-react/package-lock.json
+++ b/hearts-typescript-react/package-lock.json
@@ -8,7 +8,7 @@
       "name": "hearts-typescript-react",
       "version": "0.0.0",
       "dependencies": {
-        "immutable": "^5.1.2",
+        "immutable": "^5.1.5",
         "purify-ts": "^2.1.0",
         "react": "^19.1.0",
         "react-dom": "^19.1.0"
@@ -3047,9 +3047,9 @@
       }
     },
     "node_modules/immutable": {
-      "version": "5.1.2",
-      "resolved": "https://registry.npmjs.org/immutable/-/immutable-5.1.2.tgz",
-      "integrity": "sha512-qHKXW1q6liAk1Oys6umoaZbDRqjcjgSrbnrifHsfsttza7zcvRAsL7mMV6xWcyhwQy7Xj5v4hhbr6b+iDYwlmQ==",
+      "version": "5.1.5",
+      "resolved": "https://registry.npmjs.org/immutable/-/immutable-5.1.5.tgz",
+      "integrity": "sha512-t7xcm2siw+hlUM68I+UEOK+z84RzmN59as9DZ7P1l0994DKUWV7UXBMQZVxaoMSRQ+PBZbHCOoBt7a2wxOMt+A==",
       "license": "MIT"
     },
     "node_modules/import-fresh": {
diff --git a/hearts-typescript-react/package.json b/hearts-typescript-react/package.json
index 122e8ecd..aa18ed40 100644
--- a/hearts-typescript-react/package.json
+++ b/hearts-typescript-react/package.json
@@ -11,7 +11,7 @@
     "test": "vitest"
   },
   "dependencies": {
-    "immutable": "^5.1.2",
+    "immutable": "^5.1.5",
     "purify-ts": "^2.1.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0"