diff --git a/version.h b/version.h
index b9815ec875..d7ccb3300a 100644
--- a/version.h
+++ b/version.h
@@ -1,11 +1,11 @@
 #define RUBY_VERSION "1.9.0"
-#define RUBY_RELEASE_DATE "2004-05-17"
+#define RUBY_RELEASE_DATE "2004-05-18"
 #define RUBY_VERSION_CODE 190
-#define RUBY_RELEASE_CODE 20040517
+#define RUBY_RELEASE_CODE 20040518
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 9
 #define RUBY_VERSION_TEENY 0
 #define RUBY_RELEASE_YEAR 2004
 #define RUBY_RELEASE_MONTH 5
-#define RUBY_RELEASE_DAY 17
+#define RUBY_RELEASE_DAY 18