diff --git a/.github/workflows/dotnet-workflow-common.yml b/.github/workflows/dotnet-workflow-common.yml
index 5092b6c0..cd0ba68e 100644
--- a/.github/workflows/dotnet-workflow-common.yml
+++ b/.github/workflows/dotnet-workflow-common.yml
@@ -11,7 +11,7 @@ on:
         type: string
       DOTNET_IMAGE_ENV_VARIABLES:
         required: false
-        type: string
+        type: object
         default: {}
       CONTAINER_CI_LABELS:
         required: true