diff --git a/yarn.lock b/yarn.lock
index 5f5d659..269e05a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -135,9 +135,9 @@ handlebars@4.7.9:
     uglify-js "^3.1.4"
 
 immutable@^4.0.0:
-  version "4.2.4"
-  resolved "https://registry.yarnpkg.com/immutable/-/immutable-4.2.4.tgz#83260d50889526b4b531a5e293709a77f7c55a2a"
-  integrity sha512-WDxL3Hheb1JkRN3sQkyujNlL/xRjAo3rJtaU5xeufUauG66JdMr32bLj4gF+vWl84DIA3Zxw7tiAjneYzRRw+w==
+  version "4.3.9"
+  resolved "https://registry.yarnpkg.com/immutable/-/immutable-4.3.9.tgz#c98349e05e9c6e2a4d8fe88ac0b363e0d536b544"
+  integrity sha512-ObHy4YN7ycwZOUCLI1/6svfyAFu7vL8RhAvVu/bh/RZW9EPlOyDaQ9jDQWCtdqzaXUjgXZCW1migtHE7YI7UGQ==
 
 inflight@^1.0.4:
   version "1.0.6"