diff --git a/CMakeLists.txt b/CMakeLists.txt
index a4ed514c..888124a8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -64,7 +64,7 @@ option(UPX_CONFIG_DISABLE_EXHAUSTIVE_TESTS "Do not run exhaustive tests."
 # init
 #***********************************************************************
 
-set(UPX_VERSION_STRING "5.0.3") # this should match src/version.h
+set(UPX_VERSION_STRING "5.1.0") # this should match src/version.h
 
 upx_cmake_include_hook(2_init)
 
diff --git a/NEWS b/NEWS
index 01e9f642..56af3df7 100644
--- a/NEWS
+++ b/NEWS
@@ -2,7 +2,7 @@
 User visible changes for UPX
 ==================================================================
 
-Changes in 5.0.3 (XX XXX XXXX):
+Changes in 5.1.0 (XX XXX XXXX):
   * bug fixes - see https://github.com/upx/upx/milestone/21
 
 Changes in 5.0.2 (20 Jul 2025):
diff --git a/doc/upx.1 b/doc/upx.1
index b14b146c..62707898 100644
--- a/doc/upx.1
+++ b/doc/upx.1
@@ -55,7 +55,7 @@
 .\" ========================================================================
 .\"
 .IX Title "UPX 1"
-.TH UPX 1 2025-07-21 "upx 5.0.3" " "
+.TH UPX 1 2025-10-24 "upx 5.1.0" " "
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l
diff --git a/src/version.h b/src/version.h
index 1b2c3447..27f5d372 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1,7 +1,7 @@
 #pragma once
-#define UPX_VERSION_HEX      0x050003 /* 05.00.03 */
-#define UPX_VERSION_STRING   "5.0.3"
-#define UPX_VERSION_STRING4  "5.03"
-#define UPX_VERSION_DATE     "Jul 21st 2025"
-#define UPX_VERSION_DATE_ISO "2025-07-21"
+#define UPX_VERSION_HEX      0x050100 /* 05.01.00 */
+#define UPX_VERSION_STRING   "5.1.0"
+#define UPX_VERSION_STRING4  "5.10"
+#define UPX_VERSION_DATE     "Oct 24th 2025"
+#define UPX_VERSION_DATE_ISO "2025-10-24"
 #define UPX_VERSION_YEAR     "2025"