diff --git a/.travis.yml b/.travis.yml
index 7bac7c4..5b3015a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -56,10 +56,10 @@ install:
  # Install the combined dependencies for this package and all other packages
  # needed to reduce conflicts.
  - cabal sandbox init
- - cabal install --only-dependencies --enable-tests
+ - cabal install --only-dependencies --enable-tests --enable-benchmarks
 
 script:
- - cabal configure --enable-tests -v2
+ - cabal configure --enable-tests -v2 --enable-benchmarks
  - cabal build
  # cabal test fails due a to hpc error. Using run-cabal-test instead.
  # - cabal test --show-details=always
diff --git a/mongoDB.cabal b/mongoDB.cabal
index d5d0d88..89c2438 100644
--- a/mongoDB.cabal
+++ b/mongoDB.cabal
@@ -98,6 +98,7 @@ Benchmark bench
                     , base16-bytestring
                     , binary -any
                     , bson >= 0.3 && < 0.4
+                    , data-default-class -any
                     , text
                     , bytestring -any
                     , containers -any