diff --git a/functor-combinators.cabal b/functor-combinators.cabal
--- a/functor-combinators.cabal
+++ b/functor-combinators.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 0e3342ced1438a83a4f516f9c93e10e592dc736d2962fb6a4984b86e1bcb3bd3
+-- hash: 33941e666f0eefbbab428913a4b981e1f1fc2f2cf74864c990b14b1952b529e9
 
 name:           functor-combinators
-version:        0.1.0.0
+version:        0.1.0.1
 synopsis:       Tools for functor combinator-based program design
 description:    Tools for working with /functor combinators/: types that take functors (or
                 other indexed types) and returns a new functor that "enhances" or "mixes"
@@ -86,7 +86,7 @@
     , tagged
     , these
     , transformers
-    , trivial-constraint >=0.5
+    , trivial-constraint >=0.5.1
     , vinyl
   default-language: Haskell2010