diff --git a/hcoap.cabal b/hcoap.cabal
--- a/hcoap.cabal
+++ b/hcoap.cabal
@@ -1,6 +1,6 @@
 copyright:           Copyright (c) 2016, Ulf Lilleengen
 name:                hcoap
-version:             0.1.2.0
+version:             0.1.2.1
 synopsis:            Library for handling CoAP protocol
 license:             BSD3
 license-file:        LICENSE
@@ -28,12 +28,12 @@
                        binary >= 0.7 && < 0.8,
                        network >= 2.6 && < 2.7,
                        stm >= 2.4 && < 2.5,
-                       mtl >= 2.2 && < 2.3,
-                       time >= 1.5 && < 1.6,
-                       random >= 1.1 && < 1.2,
-                       async >= 2.1 && < 2.2,
+                       mtl >= 2.1 && < 2.3,
+                       time >= 1.4 && < 1.6,
+                       random >= 1.1 && < 2,
+                       async >= 2.0 && < 3,
                        network-uri >= 2.6 && < 3,
-                       iproute >= 1.7 && < 2,
+                       iproute >= 1.3 && < 2,
                        dns >= 2 && < 3
   hs-source-dirs:      src
   default-language:    Haskell2010