diff --git a/.github/workflows/pull-request.yaml b/.github/workflows/pull-request.yaml
index a5d93762..4a4836e2 100644
--- a/.github/workflows/pull-request.yaml
+++ b/.github/workflows/pull-request.yaml
@@ -25,7 +25,6 @@ jobs:
         with:
           dotnet-version: |
             6.0.x
-            7.0.x
 
       - name: Get .NET information
         run: dotnet --info
diff --git a/.github/workflows/push-main.yaml b/.github/workflows/push-main.yaml
index 7c83d455..5d6178e6 100644
--- a/.github/workflows/push-main.yaml
+++ b/.github/workflows/push-main.yaml
@@ -24,7 +24,6 @@ jobs:
         with:
           dotnet-version: |
             6.0.x
-            7.0.x
 
       - name: Get .NET information
         run: dotnet --info
diff --git a/build b/build
index 6145edfb..f2a1f0d6 100755
--- a/build
+++ b/build
@@ -26,8 +26,8 @@ else
 fi
 
 if which dotnet > /dev/null; then
-	if [ $(dotnet --version | cut -d. -f1) -lt 7 ]; then
-		echo "error(1): .NET SDK version $(dotnet --version) is too low; please install 7.0 or later"
+	if [ $(dotnet --version | cut -d. -f1) -lt 6 ]; then
+		echo "error(1): .NET SDK version $(dotnet --version) is too low; please install 6.0 or later"
 		exit 1
 	fi
 
diff --git a/tools/builder/build.csproj b/tools/builder/build.csproj
index 031a2c0b..4a3aef1f 100644
--- a/tools/builder/build.csproj
+++ b/tools/builder/build.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <LangVersion>11.0</LangVersion>
+    <LangVersion>10.0</LangVersion>
     <Nullable>enable</Nullable>
     <OutputType>Exe</OutputType>
     <TargetFramework>net6.0</TargetFramework>