diff --git a/elixir_buildpack.config b/elixir_buildpack.config
index eb058fb9..f5ddb1b8 100644
--- a/elixir_buildpack.config
+++ b/elixir_buildpack.config
@@ -1,4 +1,4 @@
 erlang_version=20.1
-elixir_version=1.5.0
+elixir_version=1.5.3
 always_rebuild=false
 runtime_path=/app