diff --git a/version.h b/version.h
index 5a9c403762..6cd51692fe 100644
--- a/version.h
+++ b/version.h
@@ -1,11 +1,11 @@
 #define RUBY_VERSION "1.8.1"
-#define RUBY_RELEASE_DATE "2004-05-09"
+#define RUBY_RELEASE_DATE "2004-05-10"
 #define RUBY_VERSION_CODE 181
-#define RUBY_RELEASE_CODE 20040509
+#define RUBY_RELEASE_CODE 20040510
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_YEAR 2004
 #define RUBY_RELEASE_MONTH 5
-#define RUBY_RELEASE_DAY 9
+#define RUBY_RELEASE_DAY 10