diff --git a/doc/Makefile b/doc/Makefile
index e0018bd3..2433041e 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -3,7 +3,7 @@ SHELL = /bin/sh
 top_srcdir = ..
 
 PACKAGE      = upx
-VERSION_DATE = 20 Jan 2004
+VERSION_DATE = 11 May 2004
 VERSION     := $(shell sed -n 's/^.*UPX_VERSION_STRING .*"\(.*\)".*/\1/p' $(top_srcdir)/src/version.h)
 
 TRIMSPACE = cat
diff --git a/src/version.h b/src/version.h
index e3cac60c..0a7166fe 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1,4 +1,4 @@
 #define UPX_VERSION_HEX         0x019100        /* 01.91.00 */
 #define UPX_VERSION_STRING      "1.91 beta"
 #define UPX_VERSION_STRING4     "1.91"
-#define UPX_VERSION_DATE        "Apr 14th 2004"
+#define UPX_VERSION_DATE        "May 11th 2004"