diff --git a/proto-clients/spicedb-csharp-proto/SpiceDB.Proto.csproj b/proto-clients/spicedb-csharp-proto/SpiceDB.Proto.csproj
index 410e4c5..8403864 100644
--- a/proto-clients/spicedb-csharp-proto/SpiceDB.Proto.csproj
+++ b/proto-clients/spicedb-csharp-proto/SpiceDB.Proto.csproj
@@ -8,11 +8,11 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.28.*" />
-    <PackageReference Include="Google.Api.CommonProtos" Version="2.15.*" />
-    <PackageReference Include="Grpc.Net.Client" Version="2.67.*" />
-    <PackageReference Include="Grpc.Core.Api" Version="2.67.*" />
-    <PackageReference Include="Grpc.Tools" Version="2.69.*">
+    <PackageReference Include="Google.Protobuf" Version="3.35.*" />
+    <PackageReference Include="Google.Api.CommonProtos" Version="2.17.*" />
+    <PackageReference Include="Grpc.Net.Client" Version="2.80.*" />
+    <PackageReference Include="Grpc.Core.Api" Version="2.80.*" />
+    <PackageReference Include="Grpc.Tools" Version="2.80.*">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
@@ -20,9 +20,9 @@
 
 <!-- Test dependencies -->
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.*" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.*" />
     <PackageReference Include="xunit" Version="2.9.*" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.*">
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.*">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
diff --git a/spicedb-csharp/SpiceDB.Client.Tests/SpiceDB.Client.Tests.csproj b/spicedb-csharp/SpiceDB.Client.Tests/SpiceDB.Client.Tests.csproj
index 7dfb0af..42bcafa 100644
--- a/spicedb-csharp/SpiceDB.Client.Tests/SpiceDB.Client.Tests.csproj
+++ b/spicedb-csharp/SpiceDB.Client.Tests/SpiceDB.Client.Tests.csproj
@@ -9,10 +9,10 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.12.2" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="FluentAssertions" Version="8.10.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/spicedb-csharp/SpiceDB.Client/SpiceDB.Client.csproj b/spicedb-csharp/SpiceDB.Client/SpiceDB.Client.csproj
index 0110059..e7a3eee 100644
--- a/spicedb-csharp/SpiceDB.Client/SpiceDB.Client.csproj
+++ b/spicedb-csharp/SpiceDB.Client/SpiceDB.Client.csproj
@@ -10,9 +10,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Grpc.Net.Client" Version="2.67.0" />
-    <PackageReference Include="Google.Protobuf" Version="3.29.3" />
-    <PackageReference Include="Grpc.Core.Api" Version="2.67.0" />
+    <PackageReference Include="Grpc.Net.Client" Version="2.80.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.35.0" />
+    <PackageReference Include="Grpc.Core.Api" Version="2.80.0" />
   </ItemGroup>
 
   <!-- Reference the proto-generated client project -->