diff --git a/tls-extra.cabal b/tls-extra.cabal
--- a/tls-extra.cabal
+++ b/tls-extra.cabal
@@ -1,5 +1,5 @@
 Name:                tls-extra
-Version:             0.1.8
+Version:             0.1.9
 Description:
    a set of extra definitions, default values and helpers for tls.
 License:             BSD3
@@ -30,6 +30,7 @@
   Build-Depends:     base > 3 && < 5
                    , tls >= 0.5 && < 0.6
                    , mtl
+                   , network >= 2.3
                    , cryptohash >= 0.6
                    , bytestring
                    , vector