diff --git a/eprocess.cabal b/eprocess.cabal
--- a/eprocess.cabal
+++ b/eprocess.cabal
@@ -1,5 +1,5 @@
 name: eprocess
-version: 1.5.0
+version: 1.5.1
 cabal-version: >=1.6
 build-type: Simple
 license: BSD3
@@ -25,7 +25,7 @@
 
 Library
     build-depends: base >= 4,                   base < 5,
-                   mtl >=1.1.0,                 mtl < 1.2,
+                   mtl >=1.1.0,                 mtl < 2.1,
                    MonadCatchIO-mtl >= 0.1.0,   MonadCatchIO-mtl < 0.4
     exposed-modules: Control.Concurrent.Process
     hs-source-dirs: src