diff --git a/brittany.cabal b/brittany.cabal
index b95e0eb..07504a0 100644
--- a/brittany.cabal
+++ b/brittany.cabal
@@ -106,7 +106,7 @@ library {
     , butcher >=1.1.0.0 && <1.2
     , yaml >=0.8.18 && <0.9
     , aeson >=1.0.1.0 && <1.3
-    , extra >=1.4.10 && <1.6
+    , extra >=1.4.10 && <1.7
     , uniplate >=1.6.12 && <1.7
     , strict >=0.3.2 && <0.4
     , monad-memo >=0.4.1 && <0.5