diff --git a/free-category.cabal b/free-category.cabal
index 669183f..2343e70 100644
--- a/free-category.cabal
+++ b/free-category.cabal
@@ -18,7 +18,7 @@ extra-source-files:
     bench/report-O0.md
     bench/report-O1.md
     bench/report-O2.md
-tested-with:    GHC==8.0.2, GHC==8.2.2, GHC==8.4.4, GHC==8.6.5
+tested-with:    GHC==8.0.2, GHC==8.2.2, GHC==8.4.4, GHC==8.6.5, GHC==8.8.1
 
 source-repository head
   type: git