diff --git a/src/SendGrid/SendGrid.csproj b/src/SendGrid/SendGrid.csproj
index ff5ac55e4..c32c2f55d 100644
--- a/src/SendGrid/SendGrid.csproj
+++ b/src/SendGrid/SendGrid.csproj
@@ -46,7 +46,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.0" PrivateAssets="All" Condition=" '$(OS)' != 'Windows_NT' " />
     <PackageReference Include="Newtonsoft.Json" Version="9.0.1" />
-    <PackageReference Include="starkbank-ecdsa" Version="[1.3.1, 2.0.0)" />
+    <PackageReference Include="starkbank-ecdsa" Version="[1.3.3, 2.0.0)" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net452' ">