diff --git a/.travis.yml b/.travis.yml
index 6b313c4..15d0bd4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,8 @@
 language: haskell
-ghc:
-  - 7.8
-  - 7.6
-  - 7.4
+matrix:
+  include:
+    - ghc: 7.8
+    - ghc: 7.6
+    - ghc: 7.3
+    - ghc: 7.8
+      install: cabal install --only-dependencies --enable-tests -f NoUpperBounds