diff --git a/samples/CookieSample/project.json b/samples/CookieSample/project.json
index 656b0a6e20..7d5e652710 100644
--- a/samples/CookieSample/project.json
+++ b/samples/CookieSample/project.json
@@ -26,8 +26,6 @@
         "System.Diagnostics.Tools": "4.0.0.0",
         "System.Globalization": "4.0.10.0",
         "System.IO": "4.0.0.0",
-        "System.IO.FileSystem": "4.0.0.0",
-        "System.IO.FileSystem.Primitives": "4.0.0.0",
         "System.Linq": "4.0.0.0",
         "System.Reflection": "4.0.10.0",
         "System.Resources.ResourceManager": "4.0.0.0",
diff --git a/src/Microsoft.AspNet.Security.Cookies/project.json b/src/Microsoft.AspNet.Security.Cookies/project.json
index d446612a1e..2838ae822a 100644
--- a/src/Microsoft.AspNet.Security.Cookies/project.json
+++ b/src/Microsoft.AspNet.Security.Cookies/project.json
@@ -24,8 +24,6 @@
         "System.Globalization": "4.0.10.0",
         "System.IO": "4.0.0.0",
         "System.IO.Compression": "4.0.0.0",
-        "System.IO.FileSystem": "4.0.0.0",
-        "System.IO.FileSystem.Primitives": "4.0.0.0",
         "System.Linq": "4.0.0.0",
         "System.Reflection": "4.0.10.0",
         "System.Resources.ResourceManager": "4.0.0.0",
diff --git a/src/Microsoft.AspNet.Security/project.json b/src/Microsoft.AspNet.Security/project.json
index ded011e117..ee02d0cfe5 100644
--- a/src/Microsoft.AspNet.Security/project.json
+++ b/src/Microsoft.AspNet.Security/project.json
@@ -22,8 +22,6 @@
         "System.Globalization": "4.0.10.0",
         "System.IO": "4.0.0.0",
         "System.IO.Compression": "4.0.0.0",
-        "System.IO.FileSystem": "4.0.0.0",
-        "System.IO.FileSystem.Primitives": "4.0.0.0",
         "System.Linq": "4.0.0.0",
         "System.Reflection": "4.0.10.0",
         "System.Resources.ResourceManager": "4.0.0.0",