diff --git a/csharp/src/Apache.Arrow.Flight/Apache.Arrow.Flight.csproj b/csharp/src/Apache.Arrow.Flight/Apache.Arrow.Flight.csproj
index 944a5add28d7b..39508df593a39 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="3.28.3" />
+    <PackageReference Include="Google.Protobuf" Version="3.29.0" />
     <PackageReference Include="Grpc.Net.Client" Version="2.65.0" />
     <PackageReference Include="Grpc.Tools" Version="2.67.0" PrivateAssets="All" />
     <PackageReference Include="System.Memory" Version="4.6.0" />
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 44312cd1b8420..2bca7701cd0f2 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="3.28.3" />
+    <PackageReference Include="Google.Protobuf" Version="3.29.0" />
     <PackageReference Include="Grpc.AspNetCore" Version="2.67.0" />
   </ItemGroup>