2 files changed, 2 insertions, 1 deletions
diff --git a/mix.exs b/mix.exs
index 9a632ba..730cc0a 100644
--- a/mix.exs
+++ b/mix.exs
@@ -15,6 +15,6 @@ defmodule ExPrometheusIo.Mixfile do
   end
 
   defp deps do
-    []
+    [{:poison, "~> 1.5"}]
   end
 end
diff --git a/mix.lock b/mix.lock
new file mode 100644
index 0000000..021376a
--- /dev/null
+++ b/mix.lock
@@ -0,0 +1 @@
+%{"poison": {:hex, :poison, "1.5.2"}}