diff --git a/src/GrpcJsonTranscoder/GrpcJsonTranscoder.csproj b/src/GrpcJsonTranscoder/GrpcJsonTranscoder.csproj
index f647836..e4771b7 100644
--- a/src/GrpcJsonTranscoder/GrpcJsonTranscoder.csproj
+++ b/src/GrpcJsonTranscoder/GrpcJsonTranscoder.csproj
@@ -17,7 +17,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.11.4" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.Core" Version="2.27.0" />
     <PackageReference Include="Grpc.Reflection" Version="2.27.0" />
     <PackageReference Include="Ocelot" Version="14.0.11" />