diff --git a/WebOptimizationProject/WebOptimizationProject.csproj b/WebOptimizationProject/WebOptimizationProject.csproj
index 4278a32..6d81a9f 100644
--- a/WebOptimizationProject/WebOptimizationProject.csproj
+++ b/WebOptimizationProject/WebOptimizationProject.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFramework>netstandard1.5</TargetFramework>
     <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
     <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
     <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
@@ -14,7 +14,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="DeveImageOptimizer" Version="1.0.95" />
+    <PackageReference Include="DeveImageOptimizer" Version="1.0.97" />
     <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
     <PackageReference Include="Octokit" Version="0.26.0" />
   </ItemGroup>
diff --git a/appveyor.yml b/appveyor.yml
index ce42fd7..9a59652 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,5 @@
 version: 1.0.{build}
-os: Visual Studio 2015
+os: Visual Studio 2017
 skip_tags: true
 configuration: Release