diff --git a/MQTTnet.Core/MQTTnet.Core.csproj b/MQTTnet.Core/MQTTnet.Core.csproj
index 797bb852..e2c8d6a3 100644
--- a/MQTTnet.Core/MQTTnet.Core.csproj
+++ b/MQTTnet.Core/MQTTnet.Core.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard1.1</TargetFramework>
+    <TargetFramework>netstandard1.3</TargetFramework>
     <AssemblyName>MQTTnet.Core</AssemblyName>
     <RootNamespace>MQTTnet.Core</RootNamespace>
     <GeneratePackageOnBuild>False</GeneratePackageOnBuild>