diff --git a/CHANGELOG.md b/CHANGELOG.md
index d934d7f..c38e60a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# 0.3.1 (2024/05/??)
+# 0.3.1 (2024/0?/??)
 * Minix、Haiku、とmacOSでコンパイル出来る様に
 
 # 0.3.0 (2024/05/31)