diff --git a/runtime/src/Zynga.Protobuf.Runtime/Zynga.Protobuf.Runtime.csproj b/runtime/src/Zynga.Protobuf.Runtime/Zynga.Protobuf.Runtime.csproj
index fa9db79..d3cb4b3 100644
--- a/runtime/src/Zynga.Protobuf.Runtime/Zynga.Protobuf.Runtime.csproj
+++ b/runtime/src/Zynga.Protobuf.Runtime/Zynga.Protobuf.Runtime.csproj
@@ -21,6 +21,6 @@
     <Optimize>False</Optimize>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.4.1" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
   </ItemGroup>
 </Project>
\ No newline at end of file