diff --git a/csharp/src/Apache.Arrow.Flight/Apache.Arrow.Flight.csproj b/csharp/src/Apache.Arrow.Flight/Apache.Arrow.Flight.csproj
index afe7d39194211..bcfb813c11435 100644
--- a/csharp/src/Apache.Arrow.Flight/Apache.Arrow.Flight.csproj
+++ b/csharp/src/Apache.Arrow.Flight/Apache.Arrow.Flight.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.27.3" />
+    <PackageReference Include="Google.Protobuf" Version="3.28.0" />
     <PackageReference Include="Grpc.Net.Client" Version="2.65.0" />
     <PackageReference Include="Grpc.Tools" Version="2.66.0" PrivateAssets="All" />
     <PackageReference Include="System.Memory" Version="4.5.5" />
diff --git a/csharp/test/Apache.Arrow.Flight.TestWeb/Apache.Arrow.Flight.TestWeb.csproj b/csharp/test/Apache.Arrow.Flight.TestWeb/Apache.Arrow.Flight.TestWeb.csproj
index 14227e2c4eb6b..5ed7cc47d6ac2 100644
--- a/csharp/test/Apache.Arrow.Flight.TestWeb/Apache.Arrow.Flight.TestWeb.csproj
+++ b/csharp/test/Apache.Arrow.Flight.TestWeb/Apache.Arrow.Flight.TestWeb.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.27.3" />
+    <PackageReference Include="Google.Protobuf" Version="3.28.0" />
     <PackageReference Include="Grpc.AspNetCore" Version="2.65.0" />
   </ItemGroup>