diff --git a/services/Directory/FilterLists.Directory.Api/Dockerfile b/services/Directory/FilterLists.Directory.Api/Dockerfile
index b08cc7da0..23c6396e2 100644
--- a/services/Directory/FilterLists.Directory.Api/Dockerfile
+++ b/services/Directory/FilterLists.Directory.Api/Dockerfile
@@ -1,11 +1,11 @@
 # init base
-FROM mcr.microsoft.com/dotnet/core/runtime-deps:3.1.7-alpine AS base
+FROM mcr.microsoft.com/dotnet/core/runtime-deps:3.1-alpine AS base
 LABEL org.opencontainers.image.description="filterlists.com | github.com/collinbarrett/filterlists | An ASP.NET Core API CRUD-ing with a Postgres instance via EF Core."
 WORKDIR /app
 EXPOSE 80
 
 # init build
-FROM mcr.microsoft.com/dotnet/core/sdk:3.1.401-alpine AS build
+FROM mcr.microsoft.com/dotnet/core/sdk:3.1-alpine AS build
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=true
 
 # restore API
diff --git a/services/Directory/FilterLists.Directory.Api/dev.Dockerfile b/services/Directory/FilterLists.Directory.Api/dev.Dockerfile
index 6c73fdd05..f332d04f3 100644
--- a/services/Directory/FilterLists.Directory.Api/dev.Dockerfile
+++ b/services/Directory/FilterLists.Directory.Api/dev.Dockerfile
@@ -1,10 +1,10 @@
 # init base for Visual Studio debugging
-FROM mcr.microsoft.com/dotnet/core/aspnet:3.1.7-alpine AS base
+FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-alpine AS base
 WORKDIR /app
 EXPOSE 80
 
 # init build
-FROM mcr.microsoft.com/dotnet/core/sdk:3.1.401-alpine AS build
+FROM mcr.microsoft.com/dotnet/core/sdk:3.1-alpine AS build
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=true
 
 # restore API
diff --git a/services/Directory/FilterLists.Directory.Api/migrate.Dockerfile b/services/Directory/FilterLists.Directory.Api/migrate.Dockerfile
index 76827e578..ec522e3b5 100644
--- a/services/Directory/FilterLists.Directory.Api/migrate.Dockerfile
+++ b/services/Directory/FilterLists.Directory.Api/migrate.Dockerfile
@@ -1,5 +1,5 @@
 # init test-migrations
-FROM mcr.microsoft.com/dotnet/core/sdk:3.1.401-alpine AS test-migrations
+FROM mcr.microsoft.com/dotnet/core/sdk:3.1-alpine AS test-migrations
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=true
 ENTRYPOINT ["dotnet", "test", "--logger:trx"]