diff --git a/.changeset/eleven-taxis-cross.md b/.changeset/eleven-taxis-cross.md
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@@ -0,0 +1,8 @@
+---
+"@kaizen/package-bundler": patch
+---
+
+Allow postcss-preset-env v10 in peerDependencies.
+
+Version 10 contains no breaking changes relevant to Culture Amp usage. [See the changelog for more details](https://github.com/csstools/postcss-plugins/wiki/PostCSS-Preset-Env-10).
+Version 9 is still allowed.