diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index aa1e4cc7fb9..80f59b2af67 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -31,7 +31,7 @@
     "xmlDoc": true
   },
   "dependencies": {
-    "System.Interactive.Async": "3.0.0"
+    "System.Interactive.Async": "3.1.1"
   },
   "frameworks": {
     "net45": { },
diff --git a/templates/src/csharp/Grpc.Core/project.json.template b/templates/src/csharp/Grpc.Core/project.json.template
index fcbef536c63..f8d3cf490b3 100644
--- a/templates/src/csharp/Grpc.Core/project.json.template
+++ b/templates/src/csharp/Grpc.Core/project.json.template
@@ -33,7 +33,7 @@
       "xmlDoc": true
     },
     "dependencies": {
-      "System.Interactive.Async": "3.0.0"
+      "System.Interactive.Async": "3.1.1"
     },
     "frameworks": {
       "net45": { },