diff --git a/src/Microsoft.AspNet.Identity/project.json b/src/Microsoft.AspNet.Identity/project.json
index de269b5790..1c1f0c09df 100644
--- a/src/Microsoft.AspNet.Identity/project.json
+++ b/src/Microsoft.AspNet.Identity/project.json
@@ -1,7 +1,6 @@
 {
   "version" : "0.1-alpha-*",
   "dependencies": {
-    "System.Collections.Immutable" : "1.1.15.0",
     "Microsoft.AspNet.DependencyInjection" : "0.1-alpha-*",
     "System.Security.Claims" : "0.1-alpha-*"
   },