diff --git a/InMemoryCompilers/CSharp/OneCSharpCompiler.csproj b/InMemoryCompilers/CSharp/OneCSharpCompiler.csproj
index 9a1b441..d1ce1cb 100644
--- a/InMemoryCompilers/CSharp/OneCSharpCompiler.csproj
+++ b/InMemoryCompilers/CSharp/OneCSharpCompiler.csproj
@@ -9,7 +9,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="2.6.1" />
     <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
     <PackageReference Include="System.Collections" Version="4.3.0" />
-    <PackageReference Include="System.Text.RegularExpressions" Version="4.3.0" />
+    <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
   </ItemGroup>
 
 </Project>