diff --git a/samples/GreetingsReceiver/GreetingsReceiver.csproj b/samples/GreetingsReceiver/GreetingsReceiver.csproj
index 4034e31..0e08191 100644
--- a/samples/GreetingsReceiver/GreetingsReceiver.csproj
+++ b/samples/GreetingsReceiver/GreetingsReceiver.csproj
@@ -11,7 +11,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Configuration.CommandLine" Version="2.2.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="2.2.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="3.1.4" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="2.2.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="2.2.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="2.2.0" />