diff --git a/ruby-gem/spec/dummy/yarn.lock b/ruby-gem/spec/dummy/yarn.lock
index 2aa6a372e..7bd63a379 100644
--- a/ruby-gem/spec/dummy/yarn.lock
+++ b/ruby-gem/spec/dummy/yarn.lock
@@ -2929,9 +2929,9 @@ icss-utils@^5.0.0, icss-utils@^5.1.0:
   integrity sha512-soFhflCVWLfRNOPU3iv5Z9VUdT44xFRbzjLsEzSr5AQmgqPMTHdU3PMT1Cf1ssx8fLNJDA1juftYl+PUcv3MqA==
 
 immutable@^5.1.5:
-  version "5.1.5"
-  resolved "https://registry.npmjs.org/immutable/-/immutable-5.1.5.tgz"
-  integrity sha512-t7xcm2siw+hlUM68I+UEOK+z84RzmN59as9DZ7P1l0994DKUWV7UXBMQZVxaoMSRQ+PBZbHCOoBt7a2wxOMt+A==
+  version "5.1.9"
+  resolved "https://registry.yarnpkg.com/immutable/-/immutable-5.1.9.tgz#ac23c3a01992ab665e14ac9ffff298f28cd74a0c"
+  integrity sha512-m8nVez3rwrgmWxtLMt1ZYXB2Lv7OKYn/disyxAlSDYAlKSlFoPPfIAmAM/M5xqL4m4C/wAPw7S2/CNaUii1Hxg==
 
 import-fresh@^3.2.1:
   version "3.3.0"