diff --git a/gRPC/MyProto/MyProto.csproj b/gRPC/MyProto/MyProto.csproj
index e15179e..a1965f3 100644
--- a/gRPC/MyProto/MyProto.csproj
+++ b/gRPC/MyProto/MyProto.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.7.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc" Version="1.20.0" />
     <PackageReference Include="Grpc.Tools" Version="1.20.0" PrivateAssets="All">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/gRPC/SquaredClient/packages.config b/gRPC/SquaredClient/packages.config
index 288aa3e..1920848 100644
--- a/gRPC/SquaredClient/packages.config
+++ b/gRPC/SquaredClient/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.7.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net45" />
   <package id="Grpc" version="1.20.0" targetFramework="net45" />
   <package id="Grpc.Core" version="1.20.0" targetFramework="net45" />
   <package id="Grpc.Core.Api" version="1.20.0" targetFramework="net45" />
diff --git a/gRPC/SquaredServer/packages.config b/gRPC/SquaredServer/packages.config
index 288aa3e..1920848 100644
--- a/gRPC/SquaredServer/packages.config
+++ b/gRPC/SquaredServer/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.7.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net45" />
   <package id="Grpc" version="1.20.0" targetFramework="net45" />
   <package id="Grpc.Core" version="1.20.0" targetFramework="net45" />
   <package id="Grpc.Core.Api" version="1.20.0" targetFramework="net45" />
diff --git a/gRPC/gRPC_Calculator/packages.config b/gRPC/gRPC_Calculator/packages.config
index 288aa3e..1920848 100644
--- a/gRPC/gRPC_Calculator/packages.config
+++ b/gRPC/gRPC_Calculator/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.7.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net45" />
   <package id="Grpc" version="1.20.0" targetFramework="net45" />
   <package id="Grpc.Core" version="1.20.0" targetFramework="net45" />
   <package id="Grpc.Core.Api" version="1.20.0" targetFramework="net45" />