diff --git a/version.h b/version.h
index 2d7cd7361e..a8f1a77b92 100644
--- a/version.h
+++ b/version.h
@@ -1,7 +1,7 @@
 #define RUBY_VERSION "1.9.0"
-#define RUBY_RELEASE_DATE "2007-01-30"
+#define RUBY_RELEASE_DATE "2007-01-31"
 #define RUBY_VERSION_CODE 190
-#define RUBY_RELEASE_CODE 20070130
+#define RUBY_RELEASE_CODE 20070131
 #define RUBY_PATCHLEVEL 0
 
 #define RUBY_VERSION_MAJOR 1
@@ -9,7 +9,7 @@
 #define RUBY_VERSION_TEENY 0
 #define RUBY_RELEASE_YEAR 2007
 #define RUBY_RELEASE_MONTH 1
-#define RUBY_RELEASE_DAY 30
+#define RUBY_RELEASE_DAY 31
 
 RUBY_EXTERN const char ruby_version[];
 RUBY_EXTERN const char ruby_release_date[];