diff --git a/NEWS b/NEWS
index f37b753c..741920a1 100644
--- a/NEWS
+++ b/NEWS
@@ -2,11 +2,13 @@
 User visible changes for UPX
 ==================================================================
 
-Changes in 3.10 (XX XXX 2013):
-  * Experimental support added for Windows 64-bit PE files.
-    based on the work by Stefan Widmann
+Changes in 3.91 (27 Sep 2013):
+  * Added experimental support for Windows 64-bit PE files, based on
+    work by Stefan Widmann. Please use for testing only!
   * bug fixes
 
+==================================================================
+
 Changes in 3.09 (18 Feb 2013):
   * New option --preserve-build-id for GNU ELF.
   * Allow for code signing and LC_UUID on Mac OS X executables.
diff --git a/src/version.h b/src/version.h
index e686d56a..f50047b8 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1,6 +1,6 @@
-#define UPX_VERSION_HEX         0x030a00        /* 03.10.00 */
-#define UPX_VERSION_STRING      "3.10"
-#define UPX_VERSION_STRING4     "3.10"
-#define UPX_VERSION_DATE        "Feb 20th 2013"
-#define UPX_VERSION_DATE_ISO    "2013-02-20"
+#define UPX_VERSION_HEX         0x035b00        /* 03.91.00 */
+#define UPX_VERSION_STRING      "3.91"
+#define UPX_VERSION_STRING4     "3.91"
+#define UPX_VERSION_DATE        "Sep 27th 2013"
+#define UPX_VERSION_DATE_ISO    "2013-09-27"
 #define UPX_VERSION_YEAR        "2013"