diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..38f99c8
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,3 @@
+# v0.2.0
+
+- show all faces in messages even if all people are not in a work hour
diff --git a/lib/review_bot.rb b/lib/review_bot.rb
index 1308d0b..ff076c5 100644
--- a/lib/review_bot.rb
+++ b/lib/review_bot.rb
@@ -13,4 +13,5 @@
 require_relative 'review_bot/reminder'
 
 module ReviewBot
+  VERSION = '0.2.0'.freeze
 end