diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a6b5007..21cb59d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -5,7 +5,7 @@ or submit a pull request.
 
 ### Pull request guidelines
 
-This project uses C# 12.0 language features where feasible, and adheres to StyleCop rules with some minor adjustments.
+This project uses C# 13.0 language features where feasible, and adheres to StyleCop rules with some minor adjustments.
 There is an `.editorconfig` included in this repository. For quick and painless pull requests, ensure that the analyzer does not
 throw warnings.
 
@@ -17,7 +17,7 @@ convetional commits specification.
 
 Below are a few pointers to which you may refer, but keep in mind this is not an exhaustive list:
 
-- Use C# 12.0 features where possible
+- Use C# 13.0 features where possible
 - Try to ensure code is CLS-compliant. Where this is not possible, decorate methods with `CLSCompliantAttribute` and pass `false`
 - Follow all .NET guidelines and coding conventions.
   See https://docs.microsoft.com/en-us/dotnet/csharp/fundamentals/coding-style/coding-conventions
diff --git a/Directory.Build.props b/Directory.Build.props
index 283ddde..2e583e9 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,6 +1,6 @@
 <Project>
     <PropertyGroup>
-        <LangVersion>12.0</LangVersion>
+        <LangVersion>13.0</LangVersion>
         <Optimize>true</Optimize>
         <ImplicitUsings>true</ImplicitUsings>
         <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/tools/Directory.Build.props b/tools/Directory.Build.props
index 52b14ee..51aa142 100644
--- a/tools/Directory.Build.props
+++ b/tools/Directory.Build.props
@@ -1,6 +1,6 @@
 <Project>
     <PropertyGroup>
-        <LangVersion>11.0</LangVersion>
+        <LangVersion>13.0</LangVersion>
         <Nullable>enable</Nullable>
         <ImplicitUsings>true</ImplicitUsings>
         <ExcludeFromCodeCoverage>true</ExcludeFromCodeCoverage>