diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89354d0..f6bcb36 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## Unreleased
 
+## 1.0.0
+
 - Drop Ruby 2.6 support
 - Change markdown parser from Greenmat to Qiita Marker
 - Fix bug on rendering loose tasklist
diff --git a/lib/qiita/markdown/version.rb b/lib/qiita/markdown/version.rb
index 7420128..7361630 100644
--- a/lib/qiita/markdown/version.rb
+++ b/lib/qiita/markdown/version.rb
@@ -1,5 +1,5 @@
 module Qiita
   module Markdown
-    VERSION = "0.44.1"
+    VERSION = "1.0.0"
   end
 end