diff --git a/src/csharp/Grpc.Core.Tests/packages.config b/src/csharp/Grpc.Core.Tests/packages.config
index 6a930c17ee60fb9a12c4a9541f5e94bde994e70c..456ffcd8d02147b62173a0f758846676a658f972 100644
--- a/src/csharp/Grpc.Core.Tests/packages.config
+++ b/src/csharp/Grpc.Core.Tests/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
diff --git a/src/csharp/Grpc.Core/Grpc.Core.nuspec b/src/csharp/Grpc.Core/Grpc.Core.nuspec
index 543549eb2d2c6e4b058228d35d6953d8d13b48be..a8459c4d9cd557279fd283efb09146eb6c85fd4a 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.nuspec
+++ b/src/csharp/Grpc.Core/Grpc.Core.nuspec
@@ -15,7 +15,7 @@
     <copyright>Copyright 2015, Google Inc.</copyright>
     <tags>gRPC RPC Protocol HTTP/2</tags>
     <dependencies>
-      <dependency id="Ix-Async" version="1.2.5" />
+      <dependency id="System.Interactive.Async" version="3.0.0" />
     </dependencies>
   </metadata>
   <files>
diff --git a/src/csharp/Grpc.Core/packages.config b/src/csharp/Grpc.Core/packages.config
index 80daf048d0b2dc2abd49a2f13740894bada802fc..6514774021756d2baab753ffa3b369dee925c9d6 100644
--- a/src/csharp/Grpc.Core/packages.config
+++ b/src/csharp/Grpc.Core/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 17191849e6c7baa1c246daba08d9d272e70af826..4922b8c61632bee734300575a67f27a6e0b5d538 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -31,7 +31,7 @@
     "xmlDoc": true
   },
   "dependencies": {
-    "Ix-Async": "1.2.5"
+    "System.Interactive.Async": "3.0.0"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.Examples.Tests/packages.config b/src/csharp/Grpc.Examples.Tests/packages.config
index 668601af8e772a6773682ada7e0b24bdd7463721..cc473eb34c144a5f7be82d2257ad8c5ae9c9c59b 100644
--- a/src/csharp/Grpc.Examples.Tests/packages.config
+++ b/src/csharp/Grpc.Examples.Tests/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples/packages.config b/src/csharp/Grpc.Examples/packages.config
index a70dcbd4c6834abdd91daa6a8d75b0be0e293ebd..8985ae4c77227f857a373d3971504ef7e3d6c552 100644
--- a/src/csharp/Grpc.Examples/packages.config
+++ b/src/csharp/Grpc.Examples/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec
index 7b3b391009eb05ca1ba9a85aceec8b829d22939b..4ffd18ccb21f155067e4f1b9ec1b8b2db40c1ee2 100644
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.nuspec
@@ -16,7 +16,7 @@
 	<dependencies>
 	  <dependency id="Google.Protobuf" version="$ProtobufVersion$" />
 	  <dependency id="Grpc.Core" version="$version$" />
-	  <dependency id="Ix-Async" version="1.2.3" />
+	  <dependency id="System.Interactive.Async" version="3.0.0" />
     </dependencies>
   </metadata>
   <files>
diff --git a/src/csharp/Grpc.HealthCheck/packages.config b/src/csharp/Grpc.HealthCheck/packages.config
index a52d9e508ff85be1a1f516e5e7efff23ad6e55a2..063094f7757aaeee63618fa1378e556691519ab6 100644
--- a/src/csharp/Grpc.HealthCheck/packages.config
+++ b/src/csharp/Grpc.HealthCheck/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting/packages.config b/src/csharp/Grpc.IntegrationTesting/packages.config
index 3161c5b755780f248778003a84d171d62514dea9..e6e64e655816caadc7e0a50e81bfc1b6c9a79b1d 100644
--- a/src/csharp/Grpc.IntegrationTesting/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting/packages.config
@@ -5,7 +5,7 @@
   <package id="Google.Apis.Auth" version="1.11.1" targetFramework="net45" />
   <package id="Google.Apis.Core" version="1.11.1" targetFramework="net45" />
   <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
   <package id="Moq" version="4.2.1510.2205" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />