diff --git a/src/Microsoft.AspNet.PipelineCore/project.json b/src/Microsoft.AspNet.PipelineCore/project.json
index 796736153e..ea2ee32856 100644
--- a/src/Microsoft.AspNet.PipelineCore/project.json
+++ b/src/Microsoft.AspNet.PipelineCore/project.json
@@ -24,7 +24,7 @@
         "System.Runtime.InteropServices": "4.0.20.0",
         "System.Security.Claims": "1.0.0-*",
         "System.Security.Principal" : "4.0.0.0",
-        "System.Text.Encoding": "4.0.20.0",
+        "System.Text.Encoding": "4.0.10.0",
         "System.Threading.Tasks": "4.0.10.0"
       }
     }