diff --git a/csharp/src/Apache.Arrow.Flight/Apache.Arrow.Flight.csproj b/csharp/src/Apache.Arrow.Flight/Apache.Arrow.Flight.csproj
index f15e127a30557..7fbba13b2cc0d 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="3.28.2" />
+    <PackageReference Include="Google.Protobuf" Version="3.28.3" />
     <PackageReference Include="Grpc.Net.Client" Version="2.65.0" />
     <PackageReference Include="Grpc.Tools" Version="2.67.0" 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 2282c11c1ed39..2db42e40e108a 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="3.28.2" />
+    <PackageReference Include="Google.Protobuf" Version="3.28.3" />
     <PackageReference Include="Grpc.AspNetCore" Version="2.66.0" />
   </ItemGroup>