diff --git a/mu-plugins/blocks/global-header-footer/postcss/common.css b/mu-plugins/blocks/global-header-footer/postcss/common.pcss
similarity index 100%
rename from mu-plugins/blocks/global-header-footer/postcss/common.css
rename to mu-plugins/blocks/global-header-footer/postcss/common.pcss
diff --git a/mu-plugins/blocks/global-header-footer/postcss/footer.css b/mu-plugins/blocks/global-header-footer/postcss/footer.pcss
similarity index 100%
rename from mu-plugins/blocks/global-header-footer/postcss/footer.css
rename to mu-plugins/blocks/global-header-footer/postcss/footer.pcss
diff --git a/mu-plugins/blocks/global-header-footer/postcss/header.css b/mu-plugins/blocks/global-header-footer/postcss/header.pcss
similarity index 100%
rename from mu-plugins/blocks/global-header-footer/postcss/header.css
rename to mu-plugins/blocks/global-header-footer/postcss/header.pcss
diff --git a/mu-plugins/blocks/global-header-footer/postcss/style.css b/mu-plugins/blocks/global-header-footer/postcss/style.css
deleted file mode 100644
index b2bb9ab4c..000000000
--- a/mu-plugins/blocks/global-header-footer/postcss/style.css
+++ /dev/null
@@ -1,3 +0,0 @@
-@import "common.css";
-@import "header.css";
-@import "footer.css";
diff --git a/mu-plugins/blocks/global-header-footer/postcss/style.pcss b/mu-plugins/blocks/global-header-footer/postcss/style.pcss
new file mode 100644
index 000000000..ff89ab9ee
--- /dev/null
+++ b/mu-plugins/blocks/global-header-footer/postcss/style.pcss
@@ -0,0 +1,3 @@
+@import "common.pcss";
+@import "header.pcss";
+@import "footer.pcss";
diff --git a/package.json b/package.json
index ec22035b8..92689802b 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,6 @@
 	"scripts": {
 		"start": "npm run build -- --watch",
 		"pre-build": "mkdir -p mu-plugins/blocks/global-header-footer/build",
-		"build": "npm run pre-build && postcss mu-plugins/blocks/global-header-footer/postcss/style.css --output mu-plugins/blocks/global-header-footer/build/style.css"
+		"build": "npm run pre-build && postcss mu-plugins/blocks/global-header-footer/postcss/style.pcss --output mu-plugins/blocks/global-header-footer/build/style.css"
 	}
 }