diff --git a/d-bus.cabal b/d-bus.cabal
--- a/d-bus.cabal
+++ b/d-bus.cabal
@@ -1,5 +1,5 @@
 name:                d-bus
-version:             0.0.1
+version:             0.0.1.1
 synopsis:            Permissively licensed D-Bus client library
 description:         This library uses modern extensions to the Haskell type system
                      (including GADTs, DataKinds and TypeFamilies) and the
@@ -16,7 +16,6 @@
 
 library
   hs-source-dirs:    src/
---  ghc-options:       -O2
   exposed-modules:   DBus
                    , DBus.Auth
                    , DBus.Error
@@ -33,27 +32,27 @@
                    , DBus.Types
                    , DBus.Wire
   build-depends:     base >= 4 && <5
-                   , async
-                   , attoparsec
+                   , async >= 2.0
+                   , attoparsec >= 0.11
                    , binary >= 0.7
-                   , blaze-builder
-                   , bytestring
+                   , blaze-builder >= 0.3
+                   , bytestring >= 0.10
                    , conduit >= 1.0
-                   , containers
-                   , data-binary-ieee754
-                   , data-default
-                   , free
-                   , mtl
-                   , network
-                   , singletons
-                   , stm
-                   , template-haskell
-                   , text
-                   , transformers
-                   , xml-conduit
-                   , xml-picklers
-                   , xml-types
-                   , hslogger
+                   , containers >= 0.5
+                   , data-binary-ieee754 >= 0.4
+                   , data-default >= 0.5
+                   , free >= 4.2
+                   , mtl >= 2.1
+                   , network >= 2.4
+                   , singletons >= 0.9
+                   , stm >= 2.4
+                   , template-haskell >= 2.8
+                   , text >= 1.1
+                   , transformers >= 0.3
+                   , xml-conduit >= 1.1
+                   , xml-picklers >= 0.3
+                   , xml-types >= 0.3
+                   , hslogger >= 1.2
   if os(freebsd) {
   c-sources:       src/cbits/credentials.c
   cpp-options:     -DSEND_CREDENTIALS