diff --git a/version.h b/version.h
index ee4904ccfd..4bf4d2666b 100644
--- a/version.h
+++ b/version.h
@@ -1,11 +1,11 @@
-#define RUBY_VERSION "1.8.1"
+#define RUBY_VERSION "1.9.0"
 #define RUBY_RELEASE_DATE "2003-12-25"
-#define RUBY_VERSION_CODE 181
+#define RUBY_VERSION_CODE 190
 #define RUBY_RELEASE_CODE 20031225
 
 #define RUBY_VERSION_MAJOR 1
-#define RUBY_VERSION_MINOR 8
-#define RUBY_VERSION_TEENY 1
+#define RUBY_VERSION_MINOR 9
+#define RUBY_VERSION_TEENY 0
 #define RUBY_RELEASE_YEAR 2003
 #define RUBY_RELEASE_MONTH 12
 #define RUBY_RELEASE_DAY 25