diff --git a/config/config.exs b/config/config.exs
index 8233fe9..871a3d1 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -1,3 +1,3 @@
-use Mix.Config
+import Config
 
 import_config "#{Mix.env()}.exs"
diff --git a/config/dev.exs b/config/dev.exs
index d2d855e..becde76 100644
--- a/config/dev.exs
+++ b/config/dev.exs
@@ -1 +1 @@
-use Mix.Config
+import Config
diff --git a/config/prod.exs b/config/prod.exs
index d2d855e..becde76 100644
--- a/config/prod.exs
+++ b/config/prod.exs
@@ -1 +1 @@
-use Mix.Config
+import Config
diff --git a/config/test.exs b/config/test.exs
index 0000cfb..983b681 100644
--- a/config/test.exs
+++ b/config/test.exs
@@ -1,4 +1,4 @@
-use Mix.Config
+import Config
 
 config :spear, Spear.Test.ClientFixture, connection_string: "esdb://localhost:2113"
 
diff --git a/test/spear/connection_test.exs b/test/spear/connection_test.exs
index e7979d6..e0863c6 100644
--- a/test/spear/connection_test.exs
+++ b/test/spear/connection_test.exs
@@ -3,7 +3,7 @@ defmodule Spear.ConnectionTest do
 
   import ExUnit.CaptureLog
 
-  @good_config Application.fetch_env!(:spear, :config)
+  @good_config Application.compile_env!(:spear, :config)
 
   describe "given a connection_string leading nowhere" do
     setup do
diff --git a/test/spear_test.exs b/test/spear_test.exs
index d381346..133feaf 100644
--- a/test/spear_test.exs
+++ b/test/spear_test.exs
@@ -10,7 +10,7 @@ defmodule SpearTest do
   @max_append_bytes 1_048_576
   @checkpoint_after 32 * 32 * 32
 
-  @config Application.fetch_env!(:spear, :config)
+  @config Application.compile_env!(:spear, :config)
 
   setup do
     conn = start_supervised!({Spear.Connection, @config})