diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9774869..cd55d61 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,6 +29,12 @@ jobs:
               run: |
                   git add source/wp-content/themes/wporg-documentation-2022/build --force
 
+            - name: Append build number to version
+              run: |
+                  current_version=$(grep -oP 'Version: \K[0-9]+\.[0-9]+\.[0-9]+' source/wp-content/themes/wporg-documentation-2022/style.css)
+                  new_version="${current_version}-${GITHUB_SHA::7}"
+                  sed -i "s/Version: $current_version/Version: $new_version/" source/wp-content/themes/wporg-documentation-2022/style.css
+
             - name: Commit and push
               uses: actions-js/push@a52398fac807b0c1e5f1492c969b477c8560a0ba # 1.3
               with: