diff --git a/lib/prometheus/error.ex b/lib/prometheus/error.ex
index a2f4a75..78f7b52 100644
--- a/lib/prometheus/error.ex
+++ b/lib/prometheus/error.ex
@@ -216,13 +216,7 @@ defmodule Prometheus.Error do
         e in ErlangError ->
           reraise(
             Prometheus.Error.normalize(e),
-            unquote(
-              if macro_exported?(Kernel.SpecialForms, :__STACKTRACE__, 0) do
-                quote(do: __STACKTRACE__)
-              else
-                quote(do: System.stacktrace())
-              end
-            )
+            unquote(quote(do: __STACKTRACE__))
           )
       end
     end
diff --git a/mix.exs b/mix.exs
index 8d2fa03..1c3bf7a 100644
--- a/mix.exs
+++ b/mix.exs
@@ -7,7 +7,7 @@ defmodule PrometheusEx.Mixfile do
     [
       app: :prometheus_ex,
       version: @version,
-      elixir: "~> 1.6",
+      elixir: "~> 1.7",
       build_embedded: Mix.env() == :prod,
       start_permanent: Mix.env() == :prod,
       description: description(),
@@ -32,7 +32,7 @@ defmodule PrometheusEx.Mixfile do
   end
 
   def application do
-    [applications: [:logger, :prometheus]]
+    [applications: [:logger, :mnesia, :prometheus]]
   end
 
   defp description do