diff --git a/registry-hedgehog.cabal b/registry-hedgehog.cabal
--- a/registry-hedgehog.cabal
+++ b/registry-hedgehog.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: afcc78ed8706fa89c2270d64ea3dd640a4afa2db1ed1c5982c7fcce7160ca4e5
+-- hash: 43f24c96eca61918ac318573b5f30573358d5a979075a995f8c95a09c49ccf51
 
 name:           registry-hedgehog
-version:        0.1.0.0
+version:        0.1.1.0
 synopsis:       utilities to work with Hedgehog generators and `registry`
 description:    This library provides some functions to extract generators from a "Registry" and make stateful modifications of that Registry to precisely control the generation of data
 category:       Control
diff --git a/src/Data/Registry/Hedgehog.hs b/src/Data/Registry/Hedgehog.hs
--- a/src/Data/Registry/Hedgehog.hs
+++ b/src/Data/Registry/Hedgehog.hs
@@ -138,11 +138,11 @@
 -- * CONTAINERS COMBINATORS
 
 -- | Create a generator for a pair
-pairOf :: forall a b m . (Monad m) => GenT m a -> GenT m b -> GenT m (a, b)
+pairOf :: forall a b . GenIO a -> GenIO b -> GenIO (a, b)
 pairOf ga gb = (,) <$> ga <*> gb
 
 -- | Create a generator for a triple
-tripleOf :: forall a b c m . (Monad m) => GenT m a -> GenT m b -> GenT m c -> GenT m (a, b, c)
+tripleOf :: forall a b c . GenIO a -> GenIO b -> GenIO c -> GenIO (a, b, c)
 tripleOf ga gb gc = (,,) <$> ga <*> gb <*> gc
 
 -- | Create a default generator for a small list of elements