diff --git a/.github/workflows/jekyll-gh-pages.yml b/.github/workflows/jekyll-gh-pages.yml
index e31d81c..59bc8d1 100644
--- a/.github/workflows/jekyll-gh-pages.yml
+++ b/.github/workflows/jekyll-gh-pages.yml
@@ -22,6 +22,20 @@ concurrency:
   cancel-in-progress: false
 
 jobs:
+  count:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Count themes
+        run: |
+          THEMES_NUMBER=$(ls ./themes/ | wc -l)
+          echo "Themes counted: $THEMES_NUMBER"
+          echo "THEMES_NUMBER=$THEMES_NUMBER" >> $GITHUB_ENV
+      - name: Export one variable
+        uses: UnlyEd/github-action-store-variable@v2.1.0
+        with:
+          variables: THEMES_NUMBER="$THEMES_NUMBER"
   # Build job
   build:
     runs-on: ubuntu-latest