diff --git a/.gitea/limbo_actions/buildkit-build-push/action.yaml b/.gitea/limbo_actions/buildkit-build-push/action.yaml
index 171a69c..6c2f510 100644
--- a/.gitea/limbo_actions/buildkit-build-push/action.yaml
+++ b/.gitea/limbo_actions/buildkit-build-push/action.yaml
@@ -38,10 +38,15 @@ runs:
     - name: run buildctl build and push
       shell: bash
       run: |
-
-        AUTH=$(printf '{"username":"%s","password":"%s"}' \
-          "${{ inputs.registry_username }}" \
-          "${{ inputs.registry_password }}" | base64 -w0)
+        cat > /tmp/registry-config.json <<EOF
+        {
+          "auths": {
+            "oci.limbosolutions.com": {
+              "auth": "$(printf '%s:%s' "${{ inputs.registry_username }}" "${{ inputs.registry_password }}" | base64 -w0)"
+            }
+          }
+        }
+        EOF
 
         # Build build-arg flags
         BUILD_ARG_FLAGS=""
@@ -52,12 +57,14 @@ runs:
 
         echo "Using build args: $BUILD_ARG_FLAGS"
 
+        # Build + push com credenciais por build
         buildctl \
           --addr ${{ inputs.buildkit_addr }} \
+          --registry-config /tmp/registry-config.json \
           build \
           --frontend=dockerfile.v0 \
           --local context=${{ inputs.context }} \
           --local dockerfile=${{ inputs.dockerfile }} \
           --opt filename=${{ inputs.filename }} \
           $BUILD_ARG_FLAGS \
-          --output type=image,name=${{ inputs.tags }},push=true,registry.auth=$AUTH
\ No newline at end of file
+          --output type=image,name=${{ inputs.tags }},push=true
\ No newline at end of file