diff --git a/samples/JwtBearerSample/project.json b/samples/JwtBearerSample/project.json
index c0b448b72c..f3895f83b1 100644
--- a/samples/JwtBearerSample/project.json
+++ b/samples/JwtBearerSample/project.json
@@ -9,7 +9,8 @@
     "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-*",
     "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-*",
     "Microsoft.AspNetCore.StaticFiles": "1.0.0-*",
-    "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-*"
+    "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-*",
+    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-*"
   },
   "frameworks": {
     "net451": {},
diff --git a/samples/OpenIdConnect.AzureAdSample/project.json b/samples/OpenIdConnect.AzureAdSample/project.json
index da801b5c2d..d47884d767 100644
--- a/samples/OpenIdConnect.AzureAdSample/project.json
+++ b/samples/OpenIdConnect.AzureAdSample/project.json
@@ -7,7 +7,8 @@
     "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-*",
     "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-*",
     "Microsoft.Extensions.Logging.Console": "1.0.0-*",
-    "Microsoft.IdentityModel.Clients.ActiveDirectory": "2.22.302111727"
+    "Microsoft.IdentityModel.Clients.ActiveDirectory": "2.22.302111727",
+    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-*"
   },
   "frameworks": {
     "net451": {}
diff --git a/samples/OpenIdConnectSample/project.json b/samples/OpenIdConnectSample/project.json
index b907b68f98..62506bd540 100644
--- a/samples/OpenIdConnectSample/project.json
+++ b/samples/OpenIdConnectSample/project.json
@@ -6,7 +6,8 @@
     "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-*",
     "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-*",
     "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-*",
-    "Microsoft.Extensions.Logging.Console": "1.0.0-*"
+    "Microsoft.Extensions.Logging.Console": "1.0.0-*",
+    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-*"
   },
   "frameworks": {
     "net451": {},
diff --git a/samples/SocialSample/Startup.cs b/samples/SocialSample/Startup.cs
index 474e43ae75..7cad7de849 100644
--- a/samples/SocialSample/Startup.cs
+++ b/samples/SocialSample/Startup.cs
@@ -18,8 +18,6 @@ using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Authentication;
-using Microsoft.AspNetCore.HttpOverrides;
-using Microsoft.AspNetCore.Server.Kestrel.Filter;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.FileProviders;
diff --git a/samples/SocialSample/project.json b/samples/SocialSample/project.json
index c37c5f2b16..6ff162a319 100644
--- a/samples/SocialSample/project.json
+++ b/samples/SocialSample/project.json
@@ -12,13 +12,14 @@
     "Microsoft.AspNetCore.Server.Kestrel.Https": "1.0.0-*",
     "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-*",
     "Microsoft.Extensions.FileProviders.Embedded": "1.0.0-*",
-    "Microsoft.Extensions.Logging.Console": "1.0.0-*"
+    "Microsoft.Extensions.Logging.Console": "1.0.0-*",
+    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-*"
   },
   "compilationOptions": {
     "emitEntryPoint": true
   },
   "frameworks": {
-    "net451": {},
+    "net451": { },
     "netcoreapp1.0": {
       "imports": [
         "dnxcore50"