diff --git a/package.json b/package.json
index effd656..a3a795d 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "web-ext-types": "^3.2.1",
     "webpack": "^5.74.0",
     "webpack-cli": "^4.10.0",
-    "webpack-merge": "^4.1.3"
+    "webpack-merge": "^6.0.1"
   },
   "dependencies": {
     "@material-ui/icons": "4.0.1",
diff --git a/yarn.lock b/yarn.lock
index b02920c..f8b03fd 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2960,6 +2960,11 @@ flat-cache@^3.0.4:
     flatted "^3.1.0"
     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"
@@ -7301,13 +7306,6 @@ webpack-log@^2.0.0:
     ansi-colors "^3.0.0"
     uuid "^3.3.2"
 
-webpack-merge@^4.1.3:
-  version "4.2.2"
-  resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-4.2.2.tgz#a27c52ea783d1398afd2087f547d7b9d2f43634d"
-  integrity sha512-TUE1UGoTX2Cd42j3krGYqObZbOD+xF7u28WB7tfUordytSjbWTIjK/8V0amkBfTYN4/pB/GIDlJZZ657BGG19g==
-  dependencies:
-    lodash "^4.17.15"
-
 webpack-merge@^5.7.3:
   version "5.8.0"
   resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-5.8.0.tgz#2b39dbf22af87776ad744c390223731d30a68f61"
@@ -7316,6 +7314,15 @@ webpack-merge@^5.7.3:
     clone-deep "^4.0.1"
     wildcard "^2.0.0"
 
+webpack-merge@^6.0.1:
+  version "6.0.1"
+  resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-6.0.1.tgz#50c776868e080574725abc5869bd6e4ef0a16c6a"
+  integrity sha512-hXXvrjtx2PLYx4qruKl+kyRSLc52V+cCvMxRjmKwoA+CBbbF5GfIBtR6kCvl0fYGqTUPKB+1ktVmTHqMOzgCBg==
+  dependencies:
+    clone-deep "^4.0.1"
+    flat "^5.0.2"
+    wildcard "^2.0.1"
+
 webpack-sources@^1.1.0:
   version "1.4.3"
   resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-1.4.3.tgz#eedd8ec0b928fbf1cbfe994e22d2d890f330a933"
@@ -7431,10 +7438,10 @@ wif@^2.0.1, wif@^2.0.6:
   dependencies:
     bs58check "<3.0.0"
 
-wildcard@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/wildcard/-/wildcard-2.0.0.tgz#a77d20e5200c6faaac979e4b3aadc7b3dd7f8fec"
-  integrity sha512-JcKqAHLPxcdb9KM49dufGXn2x3ssnfjbcaQdLlfZsL9rH9wgDQjUtDxbo8NE0F6SFvydeu1VhZe7hZuHsB2/pw==
+wildcard@^2.0.0, wildcard@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/wildcard/-/wildcard-2.0.1.tgz#5ab10d02487198954836b6349f74fff961e10f67"
+  integrity sha512-CC1bOL87PIWSBhDcTrdeLo6eGT7mCFtrg0uIJtqJUFyK+eJnzl8A1niH56uu7KMa5XFrtiV+AQuHO3n7DsHnLQ==
 
 word-wrap@^1.2.3:
   version "1.2.3"