diff --git a/.tool-versions b/.tool-versions
index 6576d72..fbc03ac 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-erlang 22.1.7
-elixir 1.9.4-otp-22
+erlang 23.0.2
+elixir 1.10.4