diff --git a/wolf.cabal b/wolf.cabal
--- a/wolf.cabal
+++ b/wolf.cabal
@@ -1,5 +1,5 @@
 name:                  wolf
-version:               0.3.9
+version:               0.3.10
 synopsis:              Amazon Simple Workflow Service Wrapper.
 description:           Wolf is a wrapper around Amazon Simple Workflow Service.
 homepage:              https://github.com/swift-nav/wolf
@@ -46,6 +46,7 @@
                      , exceptions
                      , filemanip
                      , filepath
+                     , http-types
                      , lifted-async
                      , monad-control
                      , optparse-applicative