diff --git a/src/csharp/Grpc.Core.Tests/packages.config b/src/csharp/Grpc.Core.Tests/packages.config
index 6a930c17ee6..456ffcd8d02 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 543549eb2d2..a8459c4d9cd 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 80daf048d0b..65147740217 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 17191849e6c..4922b8c6163 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 668601af8e7..cc473eb34c1 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 a70dcbd4c68..8985ae4c772 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 7b3b391009e..4ffd18ccb21 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 a52d9e508ff..063094f7757 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 3161c5b7557..e6e64e65581 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" />