diff --git a/package.json b/package.json
index 27c65cad8..ef16b4168 100644
--- a/package.json
+++ b/package.json
@@ -71,7 +71,7 @@
     "webpack-cli": "^5.1.4",
     "webpack-dev-server": "^4.15.1",
     "webpack-manifest-plugin": "^5.0.0",
-    "webpack-merge": "^5.9.0"
+    "webpack-merge": "^5.10.0"
   },
   "dependencies": {
     "@fontsource/atkinson-hyperlegible": "^5.0.17",
diff --git a/yarn.lock b/yarn.lock
index a7333b2f3..693b94581 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2835,6 +2835,11 @@ flat-cache@^3.1.1:
     keyv "^4.5.3"
     rimraf "^3.0.2"
 
+flat@^5.0.2:
+  version "5.0.2"
+  resolved "https://registry.yarnpkg.com/flat/-/flat-5.0.2.tgz#8ca6fe332069ffa9d324c327198c598259ceb241"
+  integrity sha512-b6suED+5/3rTpUBdG1gupIl8MPFCAMA0QXwmljLhvCUKcUvdE4gWky9zpuGCcXHOsz4J9wPGNWq6OKpmIzz3hQ==
+
 flatted@^3.1.0:
   version "3.2.7"
   resolved "https://registry.yarnpkg.com/flatted/-/flatted-3.2.7.tgz#609f39207cb614b89d0765b477cb2d437fbf9787"
@@ -5411,12 +5416,13 @@ webpack-manifest-plugin@^5.0.0:
     tapable "^2.0.0"
     webpack-sources "^2.2.0"
 
-webpack-merge@^5.7.3, webpack-merge@^5.9.0:
-  version "5.9.0"
-  resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-5.9.0.tgz#dc160a1c4cf512ceca515cc231669e9ddb133826"
-  integrity sha512-6NbRQw4+Sy50vYNTw7EyOn41OZItPiXB8GNv3INSoe3PSFaHJEz3SHTrYVaRm2LilNGnFUzh0FAwqPEmU/CwDg==
+webpack-merge@^5.10.0, webpack-merge@^5.7.3:
+  version "5.10.0"
+  resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-5.10.0.tgz#a3ad5d773241e9c682803abf628d4cd62b8a4177"
+  integrity sha512-+4zXKdx7UnO+1jaN4l2lHVD+mFvnlZQP/6ljaJVb4SZiwIKeUnrT5l0gkT8z+n4hKpC+jpOv6O9R+gLtag7pSA==
   dependencies:
     clone-deep "^4.0.1"
+    flat "^5.0.2"
     wildcard "^2.0.0"
 
 webpack-sources@^2.2.0: