diff --git a/src/Dax.Vpax.Obfuscator/Dax.Vpax.Obfuscator.csproj b/src/Dax.Vpax.Obfuscator/Dax.Vpax.Obfuscator.csproj
index 6238e8d..8c62b83 100644
--- a/src/Dax.Vpax.Obfuscator/Dax.Vpax.Obfuscator.csproj
+++ b/src/Dax.Vpax.Obfuscator/Dax.Vpax.Obfuscator.csproj
@@ -18,6 +18,7 @@
   
   <ItemGroup>
     <PackageReference Include="Dax.Vpax" />
+    <PackageReference Include="Antlr4.Runtime.Standard" />
   </ItemGroup>
 
   <ItemGroup>