diff --git a/nominal-lstar.cabal b/nominal-lstar.cabal
index 0ef3d0b..c6da77e 100644
--- a/nominal-lstar.cabal
+++ b/nominal-lstar.cabal
@@ -10,10 +10,9 @@ common stuff
   default-language:  Haskell2010
   ghc-options:       -O2 -Wall
   build-depends:
-    -- at most 4.17: one transitive dependency breaks with more recent base
-    base >= 4.8 && < 4.17,
+    base >= 4.8 && < 5,
     haskeline,
-    NLambda >= 1.1
+    NLambda >= 1.1.1
 
 library
   import: stuff