diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5a83f6b58..1cd5b2f2d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -73,7 +73,7 @@ jobs:
       matrix:
         arch: [ amd64, arm64 ]
         distro: [ alpine.3.17, alpine.3.18, alpine.3.19, alpine.3.20, centos.stream.9, debian.12, fedora.40, ubuntu.20.04, ubuntu.22.04, ubuntu.24.04 ]
-        sdk:  [ '8.0', '9.0' ]
+        sdk:  [ '6.0', '8.0', '9.0' ]
         exclude:
           - distro: alpine.3.17
             sdk: '9.0'
diff --git a/LibGit2Sharp/LibGit2Sharp.csproj b/LibGit2Sharp/LibGit2Sharp.csproj
index 611798631..f5fa36873 100644
--- a/LibGit2Sharp/LibGit2Sharp.csproj
+++ b/LibGit2Sharp/LibGit2Sharp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net472;net8.0;net6.0</TargetFrameworks>
-    <LangVersion>12.0</LangVersion>
+    <LangVersion>10.0</LangVersion>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <Description>LibGit2Sharp brings all the might and speed of libgit2, a native Git implementation, to the managed world of .NET</Description>
     <Company>LibGit2Sharp contributors</Company>