CHANGELOG.md in yao-0.2.8 vs CHANGELOG.md in yao-0.2.9

@@ -1,4 +1,14 @@
+## v0.2.9
+
+* Fix a syntax error in sample.rb vy @hsbt
+  * So added a simple syntax check loop by @udzura
+
+## v0.2.8
+
+* Introduction of `Yao.read_only` and `Yao.read_only!` by @Joe-noh (review by @hanazuki)
+  * See also issue #27
+
 ## v0.2.7
 
 * Fix `Yao::Keypair.list` is broken by @udzura
 
 ## v0.2.6