diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 8525dec..e689ac0 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -79,7 +79,7 @@ jobs:
           docker build -t shot-crafter-calculator:ci .
           echo "=== Login to Gitea Registry ==="
           echo "${{ secrets.REGISTRY_TOKEN }}" | docker login gitea.danielarroyo.cl -u "${{ secrets.REGISTRY_USERNAME }}" --password-stdin
-          SHORT_SHA="${GITHUB_SHA::7}"
+          SHORT_SHA=$(echo "$GITHUB_SHA" | cut -c1-7)
           echo "=== Tag ==="
           docker tag shot-crafter-calculator:ci gitea.danielarroyo.cl/proyectos/shot-crafter-calculator:latest
           docker tag shot-crafter-calculator:ci gitea.danielarroyo.cl/proyectos/shot-crafter-calculator:${SHORT_SHA}