diff --git a/packages/gatsby-plugin-postcss/package.json b/packages/gatsby-plugin-postcss/package.json
index 448e5bd26a964..aa949fc5ff45d 100644
--- a/packages/gatsby-plugin-postcss/package.json
+++ b/packages/gatsby-plugin-postcss/package.json
@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "@babel/runtime": "^7.20.13",
-    "postcss-loader": "^7.0.2"
+    "postcss-loader": "^7.1.0"
   },
   "devDependencies": {
     "@babel/cli": "^7.20.7",
diff --git a/yarn.lock b/yarn.lock
index c048ff0207115..e55b6c51d5c18 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8198,6 +8198,16 @@ cosmiconfig@^7.0.0:
     path-type "^4.0.0"
     yaml "^1.10.0"
 
+cosmiconfig@^8.0.0:
+  version "8.1.3"
+  resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-8.1.3.tgz#0e614a118fcc2d9e5afc2f87d53cd09931015689"
+  integrity sha512-/UkO2JKI18b5jVMJUp0lvKFMpa/Gye+ZgZjKD+DGEN9y7NRcf/nK1A0sp67ONmKtnDCNMS44E6jrk0Yc3bDuUw==
+  dependencies:
+    import-fresh "^3.2.1"
+    js-yaml "^4.1.0"
+    parse-json "^5.0.0"
+    path-type "^4.0.0"
+
 counteraction@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/counteraction/-/counteraction-1.3.0.tgz#a12fa46a6815c4e39bef6610111ec77753c59fa7"
@@ -14719,10 +14729,10 @@ kleur@^3.0.2, kleur@^3.0.3:
   resolved "https://registry.yarnpkg.com/kleur/-/kleur-3.0.3.tgz#a79c9ecc86ee1ce3fa6206d1216c501f147fc07e"
   integrity sha512-eTIzlVOSUR+JxdDFepEYcBMtZ9Qqdef+rnzWdRZuMbOywu5tO2w2N7rqjoANZ5k9vywhL6Br1VRjUIgTQx4E8w==
 
-klona@^2.0.4, klona@^2.0.5:
-  version "2.0.5"
-  resolved "https://registry.yarnpkg.com/klona/-/klona-2.0.5.tgz#d166574d90076395d9963aa7a928fabb8d76afbc"
-  integrity sha512-pJiBpiXMbt7dkzXe8Ghj/u4FfXOOa98fPW+bihOJ4SjnoijweJrNThJfd3ifXpXhREjpoF2mZVH1GfS9LV3kHQ==
+klona@^2.0.4, klona@^2.0.6:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/klona/-/klona-2.0.6.tgz#85bffbf819c03b2f53270412420a4555ef882e22"
+  integrity sha512-dhG34DXATL5hSxJbIexCft8FChFXtmskoZYnoPWjXQuebWYCNkVeV3KkGegCK9CP1oswI/vQibS2GY7Em/sJJA==
 
 konan@^2.1.1:
   version "2.1.1"
@@ -18513,13 +18523,13 @@ postcss-loader@^5.3.0:
     klona "^2.0.4"
     semver "^7.3.4"
 
-postcss-loader@^7.0.2:
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-7.0.2.tgz#b53ff44a26fba3688eee92a048c7f2d4802e23bb"
-  integrity sha512-fUJzV/QH7NXUAqV8dWJ9Lg4aTkDCezpTS5HgJ2DvqznexTbSTxgi/dTECvTZ15BwKTtk8G/bqI/QTu2HPd3ZCg==
+postcss-loader@^7.1.0:
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-7.1.0.tgz#3ba0dfddff06043f3eac7690a1d8b432264bb866"
+  integrity sha512-vTD2DJ8vJD0Vr1WzMQkRZWRjcynGh3t7NeoLg+Sb1TeuK7etiZfL/ZwHbaVa3M+Qni7Lj/29voV9IggnIUjlIw==
   dependencies:
-    cosmiconfig "^7.0.0"
-    klona "^2.0.5"
+    cosmiconfig "^8.0.0"
+    klona "^2.0.6"
     semver "^7.3.8"
 
 postcss-merge-longhand@^4.0.11: