diff --git a/CHANGELOG.md b/CHANGELOG.md
index 647cdaff5..44b911aa9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -35,6 +35,19 @@ SPDX-License-Identifier: GPL-3.0-or-later
 - irc: display nick changes and quit messages when option irc.look.ignore_tag_messages is enabled ([#2241](https://github.com/weechat/weechat/issues/2241))
 - perl: fix build when multiplicity is not available ([#2243](https://github.com/weechat/weechat/issues/2243))
 
+## Version 4.6.3 (2025-05-11)
+
+### Fixed
+
+- core: fix integer overflow with decimal numbers in calculation of expression
+- core: fix integer overflow in base32 encoding/decoding
+- core: fix integer overflow in function util_version_number
+- core: fix buffer overflow in function util_parse_time
+- core: fix buffer overflow in function eval_syntax_highlight_colorize
+- core: fix buffer overflow in function eval_string_base_encode
+- core: fix buffer overflow in function eval_string_range_chars
+- core: fix memory leak in function util_parse_delay
+
 ## Version 4.6.2 (2025-04-18)
 
 ### Fixed
diff --git a/UPGRADING.md b/UPGRADING.md
index 974315347..1e37f3e03 100644
--- a/UPGRADING.md
+++ b/UPGRADING.md
@@ -30,6 +30,14 @@ The function [util_version_number](https://weechat.org/doc/weechat/plugin/#_util
 has been fixed and now returns an "unsigned long" instead of "int", so that any
 version up to "255.255.255.255" (0xFFFFFFFF) can be returned.
 
+## Version 4.6.3
+
+### API function util_version_number
+
+An integer overflow has been fixed in the function
+[util_version_number](https://weechat.org/doc/weechat/plugin/#_util_version_number)
+which now returns a version up to "127.255.255.255" (0x7FFFFFFF).
+
 ## Version 4.6.0
 
 ### Relay remote commands
diff --git a/version.sh b/version.sh
index c3c15aec7..d2375a61d 100755
--- a/version.sh
+++ b/version.sh
@@ -41,7 +41,7 @@
 #     devel-number   the devel version as hex number ("0x04010000" for "4.1.0-dev")
 #
 
-weechat_stable="4.6.2"
+weechat_stable="4.6.3"
 weechat_devel="4.7.0-dev"
 
 stable_major=$(echo "${weechat_stable}" | cut -d"." -f1)