diff --git a/mix.exs b/mix.exs
index 624fb2d..c8ee55c 100644
--- a/mix.exs
+++ b/mix.exs
@@ -39,7 +39,7 @@ defmodule Speck.MixProject do
   # Run "mix help deps" to learn about dependencies.
   defp deps do
     [
-      {:dialyxir, "~> 1.3", only: :dev, runtime: false},
+      {:dialyxir, "1.4.3", only: :dev, runtime: false},
       {:ex_doc, "~> 0.30", only: :dev, runtime: false},
     ]
   end