diff --git a/version.h b/version.h
index 73f0ef70f0..e06e99f42e 100644
--- a/version.h
+++ b/version.h
@@ -1,7 +1,7 @@
 #define RUBY_VERSION "1.8.7"
-#define RUBY_RELEASE_DATE "2009-01-20"
+#define RUBY_RELEASE_DATE "2009-01-21"
 #define RUBY_VERSION_CODE 187
-#define RUBY_RELEASE_CODE 20090120
+#define RUBY_RELEASE_CODE 20090121
 #define RUBY_PATCHLEVEL 5000
 
 #define RUBY_VERSION_MAJOR 1
@@ -9,7 +9,7 @@
 #define RUBY_VERSION_TEENY 7
 #define RUBY_RELEASE_YEAR 2009
 #define RUBY_RELEASE_MONTH 1
-#define RUBY_RELEASE_DAY 20
+#define RUBY_RELEASE_DAY 21
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];