diff --git a/lib/koans/19_genservers.ex b/lib/koans/18_genservers.ex
similarity index 100%
rename from lib/koans/19_genservers.ex
rename to lib/koans/18_genservers.ex
diff --git a/lib/koans/18_protocols.ex b/lib/koans/19_protocols.ex
similarity index 100%
rename from lib/koans/18_protocols.ex
rename to lib/koans/19_protocols.ex
diff --git a/lib/runner.ex b/lib/runner.ex
index 5f1d98b..0c7664c 100644
--- a/lib/runner.ex
+++ b/lib/runner.ex
@@ -17,8 +17,8 @@ defmodule Runner do
     Processes,
     Tasks,
     Agents,
-    Protocols,
     GenServers,
+    Protocols,
   ]
 
   def koan?(koan), do: Enum.member?(@modules, koan)