diff --git a/formatters/tools/csharpier/Dockerfile.debian b/formatters/tools/csharpier/Dockerfile.debian
index 3d591998..c2b2e1aa 100644
--- a/formatters/tools/csharpier/Dockerfile.debian
+++ b/formatters/tools/csharpier/Dockerfile.debian
@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/sdk:8.0-bookworm-slim AS build-env
+FROM mcr.microsoft.com/dotnet/sdk:7.0-bookworm-slim AS build-env
 WORKDIR /App
 
 # https://github.com/dotnet/sdk/issues/28971#issuecomment-1308881150
diff --git a/formatters/tools/csharpier/Server.csproj b/formatters/tools/csharpier/Server.csproj
index daae52ec..81e8c286 100644
--- a/formatters/tools/csharpier/Server.csproj
+++ b/formatters/tools/csharpier/Server.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>