diff --git a/samples/ErrorPageSample/project.json b/samples/ErrorPageSample/project.json
index 22c7bf9d09..f35c2e6064 100644
--- a/samples/ErrorPageSample/project.json
+++ b/samples/ErrorPageSample/project.json
@@ -12,21 +12,21 @@
     "aspnet50": {},
     "aspnetcore50": {
       "dependencies": {
-        "System.Collections": "4.0.10.0",
-        "System.Console": "4.0.0.0",
-        "System.Diagnostics.Debug": "4.0.10.0",
-        "System.Diagnostics.Tools": "4.0.0.0",
-        "System.Globalization": "4.0.10.0",
-        "System.IO": "4.0.10.0",
-        "System.Linq": "4.0.0.0",
-        "System.Reflection": "4.0.10.0",
-        "System.Resources.ResourceManager": "4.0.0.0",
-        "System.Runtime": "4.0.20.0",
-        "System.Runtime.Extensions": "4.0.10.0",
-        "System.Runtime.InteropServices": "4.0.20.0",
+        "System.Collections": "4.0.10-beta-*",
+        "System.Console": "4.0.0-beta-*",
+        "System.Diagnostics.Debug": "4.0.10-beta-*",
+        "System.Diagnostics.Tools": "4.0.0-beta-*",
+        "System.Globalization": "4.0.10-beta-*",
+        "System.IO": "4.0.10-beta-*",
+        "System.Linq": "4.0.0-beta-*",
+        "System.Reflection": "4.0.10-beta-*",
+        "System.Resources.ResourceManager": "4.0.0-beta-*",
+        "System.Runtime": "4.0.20-beta-*",
+        "System.Runtime.Extensions": "4.0.10-beta-*",
+        "System.Runtime.InteropServices": "4.0.20-beta-*",
         "System.Security.Claims":  "1.0.0-*",
-        "System.Text.Encoding": "4.0.10.0",
-        "System.Threading.Tasks": "4.0.10.0"
+        "System.Text.Encoding": "4.0.10-beta-*",
+        "System.Threading.Tasks": "4.0.10-beta-*"
       }
     }
   }
diff --git a/samples/RuntimeInfoPageSample/project.json b/samples/RuntimeInfoPageSample/project.json
index d48d5c43b4..fe6d450cb3 100644
--- a/samples/RuntimeInfoPageSample/project.json
+++ b/samples/RuntimeInfoPageSample/project.json
@@ -1,4 +1,4 @@
-{
+{
     "webroot" : "wwwroot",
     "exclude": "wwwroot/**/*.*",
     "dependencies": {
diff --git a/samples/WelcomePageSample/project.json b/samples/WelcomePageSample/project.json
index 23546de10e..3a03cdc267 100644
--- a/samples/WelcomePageSample/project.json
+++ b/samples/WelcomePageSample/project.json
@@ -12,21 +12,21 @@
     "aspnet50": { },
     "aspnetcore50": {
       "dependencies": {
-        "System.Collections": "4.0.10.0",
-        "System.Console": "4.0.0.0",
-        "System.Diagnostics.Debug": "4.0.10.0",
-        "System.Diagnostics.Tools": "4.0.0.0",
-        "System.Globalization": "4.0.10.0",
-        "System.IO": "4.0.10.0",
-        "System.Linq": "4.0.0.0",
-        "System.Reflection": "4.0.10.0",
-        "System.Resources.ResourceManager": "4.0.0.0",
-        "System.Runtime": "4.0.20.0",
-        "System.Runtime.Extensions": "4.0.10.0",
-        "System.Runtime.InteropServices": "4.0.20.0",
+        "System.Collections": "4.0.10-beta-*",
+        "System.Console": "4.0.0-beta-*",
+        "System.Diagnostics.Debug": "4.0.10-beta-*",
+        "System.Diagnostics.Tools": "4.0.0-beta-*",
+        "System.Globalization": "4.0.10-beta-*",
+        "System.IO": "4.0.10-beta-*",
+        "System.Linq": "4.0.0-beta-*",
+        "System.Reflection": "4.0.10-beta-*",
+        "System.Resources.ResourceManager": "4.0.0-beta-*",
+        "System.Runtime": "4.0.20-beta-*",
+        "System.Runtime.Extensions": "4.0.10-beta-*",
+        "System.Runtime.InteropServices": "4.0.20-beta-*",
         "System.Security.Claims":  "1.0.0-*",
-        "System.Text.Encoding": "4.0.10.0",
-        "System.Threading.Tasks": "4.0.10.0"
+        "System.Text.Encoding": "4.0.10-beta-*",
+        "System.Threading.Tasks": "4.0.10-beta-*"
       }
     }
   }
diff --git a/src/Microsoft.AspNet.Diagnostics/project.json b/src/Microsoft.AspNet.Diagnostics/project.json
index ead8e59209..49907f1e8f 100644
--- a/src/Microsoft.AspNet.Diagnostics/project.json
+++ b/src/Microsoft.AspNet.Diagnostics/project.json
@@ -10,21 +10,21 @@
         "aspnet50": { },
         "aspnetcore50": {
             "dependencies": {
-                "System.Collections": "4.0.10.0",
-                "System.ComponentModel": "4.0.0.0",
-                "System.Diagnostics.Debug": "4.0.10.0",
-                "System.Diagnostics.Tools": "4.0.0.0",
-                "System.Globalization": "4.0.10.0",
-                "System.IO": "4.0.10.0",
-                "System.IO.FileSystem": "4.0.0.0",
-                "System.Linq": "4.0.0.0",
-                "System.Reflection": "4.0.10.0",
-                "System.Reflection.Extensions": "4.0.0.0",
-                "System.Resources.ResourceManager": "4.0.0.0",
-                "System.Runtime": "4.0.20.0",
-                "System.Runtime.Extensions": "4.0.10.0",
-                "System.Threading": "4.0.0.0",
-                "System.Threading.Tasks": "4.0.10.0"
+                "System.Collections": "4.0.10-beta-*",
+                "System.ComponentModel": "4.0.0-beta-*",
+                "System.Diagnostics.Debug": "4.0.10-beta-*",
+                "System.Diagnostics.Tools": "4.0.0-beta-*",
+                "System.Globalization": "4.0.10-beta-*",
+                "System.IO": "4.0.10-beta-*",
+                "System.IO.FileSystem": "4.0.0-beta-*",
+                "System.Linq": "4.0.0-beta-*",
+                "System.Reflection": "4.0.10-beta-*",
+                "System.Reflection.Extensions": "4.0.0-beta-*",
+                "System.Resources.ResourceManager": "4.0.0-beta-*",
+                "System.Runtime": "4.0.20-beta-*",
+                "System.Runtime.Extensions": "4.0.10-beta-*",
+                "System.Threading": "4.0.0-beta-*",
+                "System.Threading.Tasks": "4.0.10-beta-*"
             }
         }
     }
diff --git a/src/PageGenerator/project.json b/src/PageGenerator/project.json
index d9871fb90a..228d7c877c 100644
--- a/src/PageGenerator/project.json
+++ b/src/PageGenerator/project.json
@@ -10,7 +10,7 @@
         "aspnet50": { },
         "aspnetcore50": {
             "dependencies": {
-                "System.Console": "4.0.0.0"
+                "System.Console": "4.0.0-beta-*"
             }
         }
     }
diff --git a/test/Microsoft.AspNet.Diagnostics.Tests/project.json b/test/Microsoft.AspNet.Diagnostics.Tests/project.json
index 00a3ceebd9..b5cdf1db79 100644
--- a/test/Microsoft.AspNet.Diagnostics.Tests/project.json
+++ b/test/Microsoft.AspNet.Diagnostics.Tests/project.json
@@ -1,4 +1,4 @@
-{
+{
     "compilationOptions": {
         "warningsAsErrors": true
     },
@@ -15,7 +15,7 @@
         },
         "aspnetcore50": {
             "dependencies": {
-                "System.Runtime": "4.0.20.0"
+                "System.Runtime": "4.0.20-beta-*"
             }
         }
     },