diff --git a/sail/action.yml b/sail/action.yml
index 598f265..f72b4b0 100644
--- a/sail/action.yml
+++ b/sail/action.yml
@@ -42,9 +42,9 @@ runs:
     - name: validate inputs
       shell: bash
       run: |
-        [[ -z "${{ inputs.type }}" ]] || { echo "type input is empty" ; exit 1; }
-        [[ -z "${{ inputs.port_client_id }}" ]] || { echo "inputs.port_client_id input is empty" ; exit 1; }
-        [[ -z "${{ inputs.port_client_secret }}" ]] || { echo "inputs.port_client_secret input is empty" ; exit 1; }
+        [[ "${{ inputs.type }}" ]] || { echo "type input is empty" ; exit 1; }
+        [[ "${{ inputs.port_client_id }}" ]] || { echo "inputs.port_client_id input is empty" ; exit 1; }
+        [[ "${{ inputs.port_client_secret }}" ]] || { echo "inputs.port_client_secret input is empty" ; exit 1; }
 
     - name: ocean-sail
       run: |