diff --git a/.travis.yml b/.travis.yml
index c053d41..38cb214 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,4 +2,10 @@ sudo: required
 language: elixir
 elixir:
   - 1.6.4
-script: "mix test"
+script:
+  - mix test
+  - mix dialyzer --plt
+  - mix dialyzer --halt-exit-status
+cache:
+  - directories:
+      - .dialyzer
diff --git a/mix.exs b/mix.exs
index 05837c4..08a4ea1 100644
--- a/mix.exs
+++ b/mix.exs
@@ -7,7 +7,8 @@ defmodule Forecastr.MixProject do
       version: "0.1.0",
       elixir: "~> 1.6",
       start_permanent: Mix.env() == :prod,
-      deps: deps()
+      deps: deps(),
+      dialyzer: [plt_file: ".dialyzer/local.plt"]
     ]
   end