diff --git a/services/directory/src/FilterLists.Directory.Api/Dockerfile b/services/directory/src/FilterLists.Directory.Api/Dockerfile
index 3c8992ca3..d4a499007 100644
--- a/services/directory/src/FilterLists.Directory.Api/Dockerfile
+++ b/services/directory/src/FilterLists.Directory.Api/Dockerfile
@@ -1,5 +1,5 @@
 # init base
-FROM mcr.microsoft.com/dotnet/core/runtime-deps:3.1-alpine AS base
+FROM mcr.microsoft.com/dotnet/core/runtime-deps:3.1.7-alpine AS base
 WORKDIR /app
 EXPOSE 80