diff --git a/mix.exs b/mix.exs
index ce391ea..7959e90 100644
--- a/mix.exs
+++ b/mix.exs
@@ -32,7 +32,7 @@ defmodule ProcessTree.MixProject do
 
   defp deps do
     [
-      {:dialyxir, "~> 1.4", runtime: false},
+      {:dialyxir, "~> 1.4", only: :dev, runtime: false},
       {:ex_doc, "~> 0.30.3", only: :dev, runtime: false}
     ]
   end