diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 44bcac82..cffa66f1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -38,7 +38,7 @@ jobs:
       # <--- ZMĚNA: Přihlášení do GitHub Container Registry (ghcr.io)
       - name: Login to GitHub Container Registry
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.actor }} # Vaše GitHub jméno