diff --git a/version.h b/version.h
index 5ed001fc5a..4f162af17f 100644
--- a/version.h
+++ b/version.h
@@ -1,14 +1,14 @@
 #define RUBY_VERSION "1.9.0"
-#define RUBY_RELEASE_DATE "2005-01-29"
+#define RUBY_RELEASE_DATE "2005-01-31"
 #define RUBY_VERSION_CODE 190
-#define RUBY_RELEASE_CODE 20050129
+#define RUBY_RELEASE_CODE 20050131
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 9
 #define RUBY_VERSION_TEENY 0
 #define RUBY_RELEASE_YEAR 2005
 #define RUBY_RELEASE_MONTH 1
-#define RUBY_RELEASE_DAY 29
+#define RUBY_RELEASE_DAY 31
 
 RUBY_EXTERN const char ruby_version[];
 RUBY_EXTERN const char ruby_release_date[];