diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index bb61a679c1fc6848ceb38012792755d33dbe5ab5..9d706510b21c2a786fc7d9d61c83d817f9d35167 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -58,7 +58,7 @@
       "target": "project"
     },
     "Google.Protobuf": "3.0.0-beta3",
-    "CommandLineParser": "1.9.71",
+    "CommandLineParser.Unofficial": "2.0.275",
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
   },
diff --git a/templates/src/csharp/Grpc.IntegrationTesting/project.json.template b/templates/src/csharp/Grpc.IntegrationTesting/project.json.template
index 0a7d5e9af409f3b11f24beed4bce649711d32466..1cb5ca4ba37fabab4577ba771ab6adf9466f7764 100644
--- a/templates/src/csharp/Grpc.IntegrationTesting/project.json.template
+++ b/templates/src/csharp/Grpc.IntegrationTesting/project.json.template
@@ -10,7 +10,7 @@
         "target": "project"
       },
       "Google.Protobuf": "3.0.0-beta3",
-      "CommandLineParser": "1.9.71",
+      "CommandLineParser.Unofficial": "2.0.275",
       "NUnit": "3.2.0",
       "NUnitLite": "3.2.0-*"
     },