diff --git a/samples/HttpOverridesSample/project.json b/samples/HttpOverridesSample/project.json
index 21d4956fae..364757c139 100644
--- a/samples/HttpOverridesSample/project.json
+++ b/samples/HttpOverridesSample/project.json
@@ -14,7 +14,11 @@
   },
   "frameworks": {
     "dnx451": {},
-    "dnxcore50": {}
+    "netstandardapp1.5": {
+      "imports": [
+        "dnxcore50"
+      ]
+    }
   },
   "exclude": [
     "wwwroot",
@@ -24,4 +28,4 @@
     "**.user",
     "**.vspscc"
   ]
-}
+}
\ No newline at end of file
diff --git a/samples/ResponseBufferingSample/project.json b/samples/ResponseBufferingSample/project.json
index ec19f8549d..66ef9da258 100644
--- a/samples/ResponseBufferingSample/project.json
+++ b/samples/ResponseBufferingSample/project.json
@@ -14,7 +14,11 @@
   },
   "frameworks": {
     "dnx451": {},
-    "dnxcore50": {}
+    "netstandardapp1.5": {
+      "imports": [
+        "dnxcore50"
+      ]
+    }
   },
   "publishExclude": [
     "node_modules",
diff --git a/src/Microsoft.AspNetCore.Buffering/BufferingWriteStream.cs b/src/Microsoft.AspNetCore.Buffering/BufferingWriteStream.cs
index 999e05088e..9de26d9271 100644
--- a/src/Microsoft.AspNetCore.Buffering/BufferingWriteStream.cs
+++ b/src/Microsoft.AspNetCore.Buffering/BufferingWriteStream.cs
@@ -159,7 +159,7 @@ namespace Microsoft.AspNetCore.Buffering
                 return _innerStream.WriteAsync(buffer, offset, count, cancellationToken);
             }
         }
-#if !DOTNET5_4
+#if !NETSTANDARD1_3
         public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
         {
             if (_isBuffering)
diff --git a/src/Microsoft.AspNetCore.Buffering/project.json b/src/Microsoft.AspNetCore.Buffering/project.json
index f2b16827c5..8bc0487179 100644
--- a/src/Microsoft.AspNetCore.Buffering/project.json
+++ b/src/Microsoft.AspNetCore.Buffering/project.json
@@ -3,7 +3,9 @@
   "compilationOptions": {
     "warningsAsErrors": true,
     "keyFile": "../../tools/Key.snk",
-    "nowarn": [ "CS1591" ],
+    "nowarn": [
+      "CS1591"
+    ],
     "xmlDoc": true
   },
   "description": "ASP.NET middleware for buffering response bodies.",
@@ -16,6 +18,10 @@
   },
   "frameworks": {
     "net451": {},
-    "dotnet5.4": {}
+    "netstandard1.3": {
+      "imports": [
+        "dotnet5.4"
+      ]
+    }
   }
 }
\ No newline at end of file
diff --git a/src/Microsoft.AspNetCore.HttpOverrides/project.json b/src/Microsoft.AspNetCore.HttpOverrides/project.json
index 659a4da10f..20ff74debc 100644
--- a/src/Microsoft.AspNetCore.HttpOverrides/project.json
+++ b/src/Microsoft.AspNetCore.HttpOverrides/project.json
@@ -3,7 +3,9 @@
   "compilationOptions": {
     "warningsAsErrors": true,
     "keyFile": "../../tools/Key.snk",
-    "nowarn": [ "CS1591" ],
+    "nowarn": [
+      "CS1591"
+    ],
     "xmlDoc": true
   },
   "description": "XForward and Method override middlewares for ASP.NET",
@@ -18,6 +20,10 @@
   },
   "frameworks": {
     "net451": {},
-    "dotnet5.4": {}
+    "netstandard1.3": {
+      "imports": [
+        "dotnet5.4"
+      ]
+    }
   }
 }
\ No newline at end of file
diff --git a/test/Microsoft.AspNetCore.Buffering.Tests/project.json b/test/Microsoft.AspNetCore.Buffering.Tests/project.json
index 6799b57cda..ef8fb2810c 100644
--- a/test/Microsoft.AspNetCore.Buffering.Tests/project.json
+++ b/test/Microsoft.AspNetCore.Buffering.Tests/project.json
@@ -10,11 +10,14 @@
     "xunit": "2.1.0"
   },
   "frameworks": {
-    "dnxcore50": {
+    "netstandardapp1.5": {
       "dependencies": {
         "dotnet-test-xunit": "1.0.0-dev-*"
       },
-      "imports": "portable-net451+win8"
+      "imports": [
+        "dnxcore50",
+        "portable-net451+win8"
+      ]
     },
     "net451": {
       "frameworkAssemblies": {
@@ -27,4 +30,4 @@
     }
   },
   "testRunner": "xunit"
-}
+}
\ No newline at end of file
diff --git a/test/Microsoft.AspNetCore.HttpOverrides.Tests/project.json b/test/Microsoft.AspNetCore.HttpOverrides.Tests/project.json
index b9ef66bd53..8961b4e095 100644
--- a/test/Microsoft.AspNetCore.HttpOverrides.Tests/project.json
+++ b/test/Microsoft.AspNetCore.HttpOverrides.Tests/project.json
@@ -11,11 +11,14 @@
     "xunit": "2.1.0"
   },
   "frameworks": {
-    "dnxcore50": {
+    "netstandardapp1.5": {
       "dependencies": {
         "dotnet-test-xunit": "1.0.0-dev-*"
       },
-      "imports": "portable-net451+win8"
+      "imports": [
+        "dnxcore50",
+        "portable-net451+win8"
+      ]
     },
     "net451": {
       "frameworkAssemblies": {
@@ -28,4 +31,4 @@
     }
   },
   "testRunner": "xunit"
-}
+}
\ No newline at end of file