diff --git a/src/Microsoft.AspNet.Mvc.Razor.Host/project.json b/src/Microsoft.AspNet.Mvc.Razor.Host/project.json
index a79e0a1e48..3aad3f4aee 100644
--- a/src/Microsoft.AspNet.Mvc.Razor.Host/project.json
+++ b/src/Microsoft.AspNet.Mvc.Razor.Host/project.json
@@ -1,4 +1,4 @@
-{
+{
   "version": "6.0.0-*",
   "compilationOptions": {
     "warningsAsErrors": true
@@ -27,7 +27,7 @@
         "System.Dynamic.Runtime": "4.0.0.0",
         "System.Globalization": "4.0.10.0",
         "System.IO": "4.0.0.0",
-        "System.IO.FileSystem": "4.0.10.0",
+        "System.IO.FileSystem": "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.Mvc.Razor/project.json b/src/Microsoft.AspNet.Mvc.Razor/project.json
index edcf8975c7..38defe28e2 100644
--- a/src/Microsoft.AspNet.Mvc.Razor/project.json
+++ b/src/Microsoft.AspNet.Mvc.Razor/project.json
@@ -36,7 +36,7 @@
         "System.Dynamic.Runtime": "4.0.0.0",
         "System.Globalization": "4.0.10.0",
         "System.IO": "4.0.0.0",
-        "System.IO.FileSystem": "4.0.10.0",
+        "System.IO.FileSystem": "4.0.0.0",
         "System.Linq": "4.0.0.0",
         "System.Reflection": "4.0.10.0",
         "System.Resources.ResourceManager": "4.0.0.0",