diff --git a/package.json b/package.json
index f08ef19..b74532b 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   "dependencies": {
     "chalk": "^4.1.2",
     "commander": "^8.3.0",
-    "immutable": "^3.8.2",
+    "immutable": "^4.3.8",
     "redux-immutable": "^4.0.0",
     "redux-thunk": "^2.3.0",
     "sitemap": "^7.1.0",
diff --git a/yarn.lock b/yarn.lock
index 9f1bb04..43e6d5a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4669,10 +4669,10 @@ immer@9.0.19:
   resolved "https://registry.yarnpkg.com/immer/-/immer-9.0.19.tgz#67fb97310555690b5f9cd8380d38fc0aabb6b38b"
   integrity sha512-eY+Y0qcsB4TZKwgQzLaE/lqYMlKhv5J9dyd2RhhtGhNo2njPXDqU9XPfcNfa3MIDsdtZt5KlkIsirlo4dHsWdQ==
 
-immutable@^3.8.2:
-  version "3.8.2"
-  resolved "https://registry.yarnpkg.com/immutable/-/immutable-3.8.2.tgz#c2439951455bb39913daf281376f1530e104adf3"
-  integrity sha512-15gZoQ38eYjEjxkorfbcgBKBL6R7T459OuK+CpcWt7O3KF4uPCx2tD0uFETlUDIyo+1789crbMhTvQBSR5yBMg==
+immutable@^4.3.8:
+  version "4.3.8"
+  resolved "https://registry.yarnpkg.com/immutable/-/immutable-4.3.8.tgz#02d183c7727fb2bb1d5d0380da0d779dce9296a7"
+  integrity sha512-d/Ld9aLbKpNwyl0KiM2CT1WYvkitQ1TSvmRtkcV8FKStiDoA7Slzgjmb/1G2yhKM1p0XeNOieaTbFZmU1d3Xuw==
 
 import-fresh@^3.0.0, import-fresh@^3.2.1:
   version "3.3.0"