diff --git a/T4Language/source.extension.vsixmanifest b/T4Language/source.extension.vsixmanifest
index 4fc92d9..08d3b73 100644
--- a/T4Language/source.extension.vsixmanifest
+++ b/T4Language/source.extension.vsixmanifest
@@ -11,6 +11,7 @@
         <Tags>T4, Text Template</Tags>
     </Metadata>
     <Installation>
+        <InstallationTarget Id="Microsoft.VisualStudio.Community" Version="[15.0, 17.0)" />
         <InstallationTarget Id="Microsoft.VisualStudio.Community" Version="[17.0, 18.0)">
             <ProductArchitecture>amd64</ProductArchitecture>
         </InstallationTarget>
@@ -19,7 +20,7 @@
         </InstallationTarget>
     </Installation>
     <Prerequisites>
-        <Prerequisite Id="Microsoft.VisualStudio.Component.CoreEditor" Version="[17.0,18.0)" DisplayName="Visual Studio core editor" />
+        <Prerequisite Id="Microsoft.VisualStudio.Component.CoreEditor" Version="[15.0,)" DisplayName="Visual Studio core editor" />
     </Prerequisites>
     <Assets>
         <Asset Type="Microsoft.VisualStudio.VsPackage" d:Source="File" Path="Grammars.pkgdef" />