diff --git a/http-reverse-proxy.cabal b/http-reverse-proxy.cabal
index 43c025e..f4acd2c 100644
--- a/http-reverse-proxy.cabal
+++ b/http-reverse-proxy.cabal
@@ -51,6 +51,7 @@ test-suite test
   type:             exitcode-stdio-1.0
   main-is:          main.hs
   hs-source-dirs:   test
+  ghc-options:      -threaded
   build-depends:
       base                <10
     , blaze-builder