diff --git a/src/dotnetcore31/AzureFunctions.Cosmos/AzureFunctions.Cosmos.csproj b/src/dotnetcore31/AzureFunctions.Cosmos/AzureFunctions.Cosmos.csproj
index 9cb43787..898c32f6 100644
--- a/src/dotnetcore31/AzureFunctions.Cosmos/AzureFunctions.Cosmos.csproj
+++ b/src/dotnetcore31/AzureFunctions.Cosmos/AzureFunctions.Cosmos.csproj
@@ -8,7 +8,7 @@
     <PackageReference Include="Microsoft.Azure.Functions.Extensions" Version="1.1.0"/>
     <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.CosmosDB" Version="3.0.10"/>
     <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.Storage" Version="4.0.5"/>
-    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="3.1.0"/>
+    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.1.3"/>
   </ItemGroup>
   <ItemGroup>
     <None Update="host.json">