diff --git a/package.json b/package.json
index 3904ef641f..46e4c92c79 100644
--- a/package.json
+++ b/package.json
@@ -231,7 +231,7 @@
     "webpack": "4.44.2",
     "webpack-dev-middleware": "3.7.2",
     "webpack-dev-server": "3.11.0",
-    "webpack-merge": "5.3.0",
+    "webpack-merge": "5.4.0",
     "webpack-sources": "2.0.1",
     "webpack-subresource-integrity": "1.5.2",
     "worker-plugin": "5.0.0",
diff --git a/packages/angular_devkit/build_angular/package.json b/packages/angular_devkit/build_angular/package.json
index dc0c823bc6..c698c5c2a9 100644
--- a/packages/angular_devkit/build_angular/package.json
+++ b/packages/angular_devkit/build_angular/package.json
@@ -72,7 +72,7 @@
     "webpack": "4.44.2",
     "webpack-dev-middleware": "3.7.2",
     "webpack-dev-server": "3.11.0",
-    "webpack-merge": "5.3.0",
+    "webpack-merge": "5.4.0",
     "webpack-sources": "2.0.1",
     "webpack-subresource-integrity": "1.5.2",
     "worker-plugin": "5.0.0"
diff --git a/yarn.lock b/yarn.lock
index fe8bed2b29..09779b7ae0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -12715,10 +12715,10 @@ webpack-log@^2.0.0:
     ansi-colors "^3.0.0"
     uuid "^3.3.2"
 
-webpack-merge@5.3.0:
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-5.3.0.tgz#a80df44d35fabace680bf430a19fda9ec49ed8eb"
-  integrity sha512-4PtsBAWnmJULIJYviiPq4BxwAykbAgGMheyEVaemj2bJI54h+p/gnlbXZEH2EM0IYC3blOE1Qm6kzKlc06N1UQ==
+webpack-merge@5.4.0:
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-5.4.0.tgz#81bef0a7d23fc1e6c24b06ad8bf22ddeb533a3a3"
+  integrity sha512-/scBgu8LVPlHDgqH95Aw1xS+L+PHrpHKOwYVGFaNOQl4Q4wwwWDarwB1WdZAbLQ24SKhY3Awe7VZGYAdp+N+gQ==
   dependencies:
     clone-deep "^4.0.1"
     wildcard "^2.0.0"