diff --git a/src/Microsoft.AspNet.Mvc.Cors/project.json b/src/Microsoft.AspNet.Mvc.Cors/project.json
index 5cb810e5be..650d547f81 100644
--- a/src/Microsoft.AspNet.Mvc.Cors/project.json
+++ b/src/Microsoft.AspNet.Mvc.Cors/project.json
@@ -9,7 +9,7 @@
         "warningsAsErrors": true
     },
     "dependencies": {
-        "Microsoft.AspNet.Cors.Core": "1.0.0-*",
+        "Microsoft.AspNet.Cors.Core": "6.0.0-*",
         "Microsoft.AspNet.Mvc.Core": "6.0.0-*",
         "Microsoft.Framework.NotNullAttribute.Sources": {
             "version": "1.0.0-*",
diff --git a/test/WebSites/CorsMiddlewareWebSite/project.json b/test/WebSites/CorsMiddlewareWebSite/project.json
index d983b9a898..c713e9238e 100644
--- a/test/WebSites/CorsMiddlewareWebSite/project.json
+++ b/test/WebSites/CorsMiddlewareWebSite/project.json
@@ -5,7 +5,7 @@
     },
     "dependencies": {
         "Microsoft.AspNet.Server.Kestrel": "1.0.0-*",
-        "Microsoft.AspNet.Cors": "1.0.0-*",
+        "Microsoft.AspNet.Cors": "6.0.0-*",
         "Microsoft.AspNet.Mvc": "6.0.0-*",
         "Microsoft.AspNet.Mvc.Formatters.Xml": "6.0.0-*",
         "Microsoft.AspNet.Mvc.TestConfiguration": "1.0.0",
diff --git a/test/WebSites/CorsWebSite/project.json b/test/WebSites/CorsWebSite/project.json
index 11e525311c..1163d435af 100644
--- a/test/WebSites/CorsWebSite/project.json
+++ b/test/WebSites/CorsWebSite/project.json
@@ -5,7 +5,7 @@
     },
     "dependencies": {
         "Microsoft.AspNet.Server.Kestrel": "1.0.0-*",
-        "Microsoft.AspNet.Cors.Core": "1.0.0-*",
+        "Microsoft.AspNet.Cors.Core": "6.0.0-*",
         "Microsoft.AspNet.Mvc": "6.0.0-*",
         "Microsoft.AspNet.Mvc.Formatters.Xml": "6.0.0-*",
         "Microsoft.AspNet.Mvc.TestConfiguration": "1.0.0",