diff --git a/ruby-gem/spec/dummy/package.json b/ruby-gem/spec/dummy/package.json
index bc65a9823..f2501b18c 100644
--- a/ruby-gem/spec/dummy/package.json
+++ b/ruby-gem/spec/dummy/package.json
@@ -48,7 +48,7 @@
     "sass": "^1.92.1",
     "sass-loader": "^16.0.5",
     "set-state-compare": "^1.0.58",
-    "shakapacker": "8.2.0",
+    "shakapacker": "8.4.0",
     "stacktrace-parser": "^0.1.11",
     "stimulus": "^3.2.2",
     "style-loader": "^4.0.0",
diff --git a/ruby-gem/spec/dummy/yarn.lock b/ruby-gem/spec/dummy/yarn.lock
index 38d035331..3cfceb43a 100644
--- a/ruby-gem/spec/dummy/yarn.lock
+++ b/ruby-gem/spec/dummy/yarn.lock
@@ -4182,10 +4182,10 @@ setprototypeof@1.2.0:
   resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.2.0.tgz#66c9a24a73f9fc28cbe66b09fed3d33dcaf1b424"
   integrity sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw==
 
-shakapacker@8.2.0:
-  version "8.2.0"
-  resolved "https://registry.yarnpkg.com/shakapacker/-/shakapacker-8.2.0.tgz#c7bed87b8be2ae565cfe616f68552be545c77e14"
-  integrity sha512-Ct7BFqJVnKbxdqCzG+ja7Q6LPt/PlB7sSVBfG5jsAvmVCADM05cuoNwEgYNjFGKbDzHAxUqy5XgoI9Y030+JKQ==
+shakapacker@8.4.0:
+  version "8.4.0"
+  resolved "https://registry.yarnpkg.com/shakapacker/-/shakapacker-8.4.0.tgz#be37a2adba5a090f581811b8c0c1a00f2e227580"
+  integrity sha512-ZfuxfHxy5tdjv7tCdRZHJKJQLDFwvFXOVBVUj150zgNuRKUlOAyXzOBp9/G5hUhu4MLzuPAif/fuKOdjnZeVtw==
   dependencies:
     js-yaml "^4.1.0"
     path-complete-extname "^1.0.0"