diff --git a/src/Microsoft.AspNetCore.Authentication/project.json b/src/Microsoft.AspNetCore.Authentication/project.json
index a676d2300..915c2ff81 100644
--- a/src/Microsoft.AspNetCore.Authentication/project.json
+++ b/src/Microsoft.AspNetCore.Authentication/project.json
@@ -38,11 +38,7 @@
     "NETStandard.Library": "1.6.1"
   },
   "frameworks": {
-    "net451": {
-      "frameworkAssemblies": {
-        "System.Net.Http": ""
-      }
-    },
+    "net451": { },
     "netstandard1.3": {}
   }
 }
\ No newline at end of file
diff --git a/src/Microsoft.AspNetCore.Authorization/project.json b/src/Microsoft.AspNetCore.Authorization/project.json
index cda750f43..32f67b5cc 100644
--- a/src/Microsoft.AspNetCore.Authorization/project.json
+++ b/src/Microsoft.AspNetCore.Authorization/project.json
@@ -29,13 +29,7 @@
     "NETStandard.Library": "1.6.1"
   },
   "frameworks": {
-    "net451": {
-      "frameworkAssemblies": {
-        "System.Runtime": {
-          "type": "build"
-        }
-      }
-    },
+    "net451": { },
     "netstandard1.3": {
       "dependencies": {
         "System.Security.Claims": "4.3.0"