diff --git a/Lighthouse.Frontend/pnpm-lock.yaml b/Lighthouse.Frontend/pnpm-lock.yaml
index c7b3ec9c6..c521cf326 100644
--- a/Lighthouse.Frontend/pnpm-lock.yaml
+++ b/Lighthouse.Frontend/pnpm-lock.yaml
@@ -11,7 +11,7 @@ overrides:
   fast-uri: ^3.1.8
   form-data: ^4.0.6
   immutable@>=5.0.0-beta.1 <5.1.8: ^5.1.9
-  postcss: ^8.5.23
+  postcss: ^8.5.28
   undici: ^7.28.0
   vitest: ^5.0.0
   ws: ^8.18.0
diff --git a/Lighthouse.Frontend/pnpm-workspace.yaml b/Lighthouse.Frontend/pnpm-workspace.yaml
index 9b67801e9..a31be2b90 100644
--- a/Lighthouse.Frontend/pnpm-workspace.yaml
+++ b/Lighthouse.Frontend/pnpm-workspace.yaml
@@ -8,7 +8,7 @@ overrides:
   fast-uri: ^3.1.8
   form-data: ^4.0.6
   immutable@>=5.0.0-beta.1 <5.1.8: ^5.1.9
-  postcss: ^8.5.23
+  postcss: ^8.5.28
   undici: ^7.28.0
   # Mutation testing's runner accepts any vitest from 2 upward, so the resolver was free to keep an
   # older copy for it while the suite moved on. It then drove one version of the test framework while