diff --git a/src/Dockerfile-worker-api-dev b/src/Dockerfile-worker-api-dev
index 9e48e69b..5475e914 100644
--- a/src/Dockerfile-worker-api-dev
+++ b/src/Dockerfile-worker-api-dev
@@ -1,5 +1,6 @@
-# Use the official Microsoft .NET runtime as the base image (for worker service, not API)
-FROM mcr.microsoft.com/dotnet/runtime:8.0 AS base
+# Use the official Microsoft ASP.NET Core runtime as the base image
+# Required because Microsoft.AspNetCore.SignalR.Core dependency needs ASP.NET Core runtime
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
 WORKDIR /app
 
 # Use the official Microsoft .NET SDK image to build the code.