diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index c78de89cf89..f259459a717 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -5,7 +5,7 @@
 
   "dependencies": {
     "Grpc.Core": "0.0.1",
-    "Google.Protobuf": "3.0.0-beta2"
+    "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index 0984d43deca..220224819f8 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -16,7 +16,7 @@
 
   "dependencies": {
     "Grpc.Core": "0.14.0-anexperiment",
-    "Google.Protobuf": "3.0.0-beta2"
+    "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index f2cda96e7be..93cabf21bcf 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -9,7 +9,7 @@
   "dependencies": {
     "Grpc.Auth": "0.0.1",
     "Grpc.Core": "0.0.1",
-    "Google.Protobuf": "3.0.0-beta2",
+    "Google.Protobuf": "3.0.0-beta3",
     "CommandLineParser": "1.9.71",
     "Moq": "4.2.1510.2205",
     "NUnit": "3.2.0",