diff --git a/package-lock.json b/package-lock.json
index 2f9f850..40f2bbe 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,7 @@
         "express": "^5.2.1",
         "express-handlebars": "^8.0.1",
         "express-session": "^1.14.0",
-        "immutable": "^5.1.5",
+        "immutable": "^5.1.8",
         "mongodb": "^5.8.1",
         "serve-favicon": "^2.3.0",
         "underscore": "^1.13.8"
@@ -908,9 +908,9 @@
       }
     },
     "node_modules/immutable": {
-      "version": "5.1.5",
-      "resolved": "https://registry.npmjs.org/immutable/-/immutable-5.1.5.tgz",
-      "integrity": "sha512-t7xcm2siw+hlUM68I+UEOK+z84RzmN59as9DZ7P1l0994DKUWV7UXBMQZVxaoMSRQ+PBZbHCOoBt7a2wxOMt+A==",
+      "version": "5.1.8",
+      "resolved": "https://registry.npmjs.org/immutable/-/immutable-5.1.8.tgz",
+      "integrity": "sha512-TM5YqrGeTsVIPPpILzeqZ8D2Zc2TvNgSDi88zPF2a4cyqQdWV/wVWBDRDbNzzrLeRWScrFcOX9lW2iX6GOtUDw==",
       "license": "MIT"
     },
     "node_modules/inherits": {
diff --git a/package.json b/package.json
index 83018ce..dfa3a8b 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "express": "^5.2.1",
     "express-handlebars": "^8.0.1",
     "express-session": "^1.14.0",
-    "immutable": "^5.1.5",
+    "immutable": "^5.1.8",
     "mongodb": "^5.8.1",
     "serve-favicon": "^2.3.0",
     "underscore": "^1.13.8"