diff --git a/src/Microsoft.AspNet.Hosting/project.json b/src/Microsoft.AspNet.Hosting/project.json
index 6ae4213509..d77f6393d3 100644
--- a/src/Microsoft.AspNet.Hosting/project.json
+++ b/src/Microsoft.AspNet.Hosting/project.json
@@ -1,4 +1,4 @@
-{
+{
   "version": "1.0.0-*",
   "dependencies": {
     "Microsoft.AspNet.FeatureModel": "1.0.0-*",
@@ -14,7 +14,7 @@
     "net45": {},
     "k10": {
       "dependencies": {
-        "System.Collections": "4.0.0.0",
+        "System.Collections": "4.0.10.0",
         "System.ComponentModel": "4.0.0.0",
         "System.Console": "4.0.0.0",
         "System.Diagnostics.Debug": "4.0.10.0",
diff --git a/src/Microsoft.AspNet.RequestContainer/project.json b/src/Microsoft.AspNet.RequestContainer/project.json
index eb0b844d0f..7c3a92c05e 100644
--- a/src/Microsoft.AspNet.RequestContainer/project.json
+++ b/src/Microsoft.AspNet.RequestContainer/project.json
@@ -1,4 +1,4 @@
-{
+{
   "version": "1.0.0-*",
   "dependencies": {
     "Microsoft.AspNet.Http": "1.0.0-*",
@@ -9,7 +9,7 @@
     "net45": {},
     "k10": {
       "dependencies": {
-        "System.Collections": "4.0.0.0",
+        "System.Collections": "4.0.10.0",
         "System.ComponentModel": "4.0.0.0",
         "System.Diagnostics.Debug": "4.0.10.0",
         "System.Linq": "4.0.0.0",
diff --git a/src/Microsoft.AspNet.TestHost/project.json b/src/Microsoft.AspNet.TestHost/project.json
index 9d38c71bfe..1592b1a2c3 100644
--- a/src/Microsoft.AspNet.TestHost/project.json
+++ b/src/Microsoft.AspNet.TestHost/project.json
@@ -1,4 +1,4 @@
-{
+{
   "version" : "1.0.0-*",
   "dependencies": {
     "Microsoft.AspNet.Hosting": ""
@@ -7,7 +7,7 @@
     "net45": { },
     "k10" : {
         "dependencies": {
-            "System.Collections": "4.0.0.0",
+            "System.Collections": "4.0.10.0",
             "System.ComponentModel": "4.0.0.0",
             "System.Globalization": "4.0.10.0",
             "System.Linq": "4.0.0.0",