diff --git a/actions/docker-multiple-login-develop/action.yml b/actions/docker-multiple-login-develop/action.yml
index a23606f..3420fd1 100644
--- a/actions/docker-multiple-login-develop/action.yml
+++ b/actions/docker-multiple-login-develop/action.yml
@@ -128,14 +128,32 @@ runs:
         username: ${{ inputs.azure-client-id  }}
         password: ${{ inputs.azure-client-secret }}
 
+    # _json_key_base64 is not supported so we must convert it
+    - name: GCR Keys
+      if: ${{ inputs.gcr-json-key-base64 }}
+      run: |
+        echo "$GCR_JSON_KEY_BASE64" | base64 --decode >> .gcr-key
+        while read -r line;
+        do
+         echo "::add-mask::${line}"
+        done <<< "$(cat .gcr-key)"
+        echo "GCR_JSON_KEY<<EOF" >> $GITHUB_ENV
+        cat .gcr-key >> $GITHUB_ENV
+        echo "EOF" >> $GITHUB_ENV
+        # clean up
+        rm .gcr-key
+      shell: bash
+      env:
+        GCR_JSON_KEY_BASE64: ${{ inputs.gcr-json-key-base64 }}
+
     # https://github.com/docker/login-action#google-container-registry-gcr
     - name: Login to Google Container Registry (GCR)
       uses: docker/login-action@v1
       if: ${{ inputs.gcr-json-key-base64 }}
       with:
         registry: gcr.io
-        username: _json_key_base64
-        password: ${{ inputs.gcr-json-key-base64 }}
+        username: _json_key
+        password: ${{ env.GCR_JSON_KEY }}
 
     # https://github.com/docker/login-action#google-artifact-registry-gar
     - name: Login to Google Artifact Registry (GAR)