diff --git a/directory/src/FilterLists.Directory.Api/Dockerfile b/directory/src/FilterLists.Directory.Api/Dockerfile
index cc4c5612b..868117610 100644
--- a/directory/src/FilterLists.Directory.Api/Dockerfile
+++ b/directory/src/FilterLists.Directory.Api/Dockerfile
@@ -1,11 +1,11 @@
 #See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.
 
-FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-buster-slim AS base
+FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-alpine AS base
 WORKDIR /app
 EXPOSE 80
 EXPOSE 443
 
-FROM mcr.microsoft.com/dotnet/core/sdk:3.1-buster AS build
+FROM mcr.microsoft.com/dotnet/core/sdk:3.1-alpine AS build
 WORKDIR /src
 COPY ["directory/src/FilterLists.Directory.Api/FilterLists.Directory.Api.csproj", "directory/src/FilterLists.Directory.Api/"]
 RUN dotnet restore "directory/src/FilterLists.Directory.Api/FilterLists.Directory.Api.csproj"