diff --git a/CHANGELOG.org b/CHANGELOG.org
index 229dbc8..bf10a8f 100644
--- a/CHANGELOG.org
+++ b/CHANGELOG.org
@@ -18,6 +18,7 @@
 - =emaps-describe-keymap= and =emaps-describe-keymap-bindings=
   will now default the prompt to the current major mode map if
   the symbol at point is not a keymap symbol
+- package now uses lexical binding
 
 * 0.1.0 - 2018-07-12
 
diff --git a/emaps.el b/emaps.el
index 4430a0e..e7c7fcd 100644
--- a/emaps.el
+++ b/emaps.el
@@ -1,4 +1,4 @@
-;;; emaps.el --- utilities for working with keymaps.
+;;; emaps.el --- utilities for working with keymaps -*- lexical-binding: t; -*-
 
 ;; This program is free software: you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published by
diff --git a/tests/emaps-tests.el b/tests/emaps-tests.el
index 2b979b6..087eda8 100644
--- a/tests/emaps-tests.el
+++ b/tests/emaps-tests.el
@@ -1,4 +1,4 @@
-;;; emaps-tests.el
+;;; emaps-tests.el -*- lexical-binding: t; -*-
 ;;; Code:
 
 (require 'ert)