diff --git a/users/Profpatsch/whatcd-resolver/whatcd-resolver.cabal b/users/Profpatsch/whatcd-resolver/whatcd-resolver.cabal
index a9bd04827..8b3258bb5 100644
--- a/users/Profpatsch/whatcd-resolver/whatcd-resolver.cabal
+++ b/users/Profpatsch/whatcd-resolver/whatcd-resolver.cabal
@@ -119,3 +119,7 @@ executable whatcd-resolver
     build-depends:
         base >=4.15 && <5,
         whatcd-resolver
+
+    ghc-options:
+      -threaded
+