diff --git a/changelog.rst b/changelog.rst
index 8d2317d6..e0d7f115 100644
--- a/changelog.rst
+++ b/changelog.rst
@@ -1,6 +1,17 @@
 ZoiteChat ChangeLog
 =================
 
+2.18.3 (2026-06-29)
+-------------------
+
+- Added IRCv3 support for message tags, echo-message, typing notifications, and replies.
+- Restored the accept-invalid-cert TLS bypass behavior.
+- Replaced legacy IPv4 APIs and added support for OpenSSL 4 APIs.
+- Snapshot Python hooks during plugin unload for safer plugin shutdown.
+- Fixed Windows GtkStatusIcon tray menu popup behavior.
+- Fixed self-echoed private messages routing to the target tab.
+- Fixed the lag ping timeout window.
+
 2.18.2 (2026-06-20)
 -------------------
 
diff --git a/data/misc/net.zoite.Zoitechat.appdata.xml.in b/data/misc/net.zoite.Zoitechat.appdata.xml.in
index d213bd98..6e3d0d9d 100644
--- a/data/misc/net.zoite.Zoitechat.appdata.xml.in
+++ b/data/misc/net.zoite.Zoitechat.appdata.xml.in
@@ -29,6 +29,19 @@
     <id>zoitechat.desktop</id>
   </provides>
 <releases>
+<release date="2026-06-29" version="2.18.3">
+  <description>
+    <ul>
+      <li>Added IRCv3 support for message tags, echo-message, typing notifications, and replies.</li>
+      <li>Restored the accept-invalid-cert TLS bypass behavior.</li>
+      <li>Replaced legacy IPv4 APIs and added support for OpenSSL 4 APIs.</li>
+      <li>Snapshot Python hooks during plugin unload for safer plugin shutdown.</li>
+      <li>Fixed Windows GtkStatusIcon tray menu popup behavior.</li>
+      <li>Fixed self-echoed private messages routing to the target tab.</li>
+      <li>Fixed the lag ping timeout window.</li>
+    </ul>
+  </description>
+</release>
 <release date="2026-06-20" version="2.18.2">
   <description>
     <p>Security and connections:</p>
diff --git a/meson.build b/meson.build
index 1b7b6667..7c26197a 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('zoitechat', 'c',
-  version: '2.18.2',
+  version: '2.18.3',
   meson_version: '>= 0.55.0',
   default_options: [
     'c_std=c17',
diff --git a/packaging/fedora/zoitechat.spec b/packaging/fedora/zoitechat.spec
index 20acb3c9..fbc7761d 100644
--- a/packaging/fedora/zoitechat.spec
+++ b/packaging/fedora/zoitechat.spec
@@ -1,5 +1,5 @@
 Name:           zoitechat
-Version:        2.18.2
+Version:        2.18.3
 Release:        %autorelease
 Summary:        HexChat-based IRC client
 License:        GPL-2.0-or-later WITH cryptsetup-OpenSSL-exception
diff --git a/plugins/python/python.py b/plugins/python/python.py
index d1eeb76c..94d2e83a 100644
--- a/plugins/python/python.py
+++ b/plugins/python/python.py
@@ -19,7 +19,7 @@ else:
 if not hasattr(sys, 'argv'):
     sys.argv = ['<zoitechat>']
 
-VERSION = b'2.18.2'
+VERSION = b'2.18.3'
 PLUGIN_NAME = ffi.new('char[]', b'Python')
 PLUGIN_DESC = ffi.new('char[]', b'Python %d.%d scripting interface' % (sys.version_info[0], sys.version_info[1]))
 PLUGIN_VERSION = ffi.new('char[]', VERSION)
diff --git a/win32/version.txt b/win32/version.txt
index 61dc3342..26452813 100644
--- a/win32/version.txt
+++ b/win32/version.txt
@@ -1 +1 @@
-2.18.2
+2.18.3