diff --git a/debian/changelog b/debian/changelog
index 820ef51d..a7b56aa5 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,16 @@
+quark-engine (26.1.1-0kali1) kali-dev; urgency=medium
+
+  * Rule Enhancement
+
+    - Add 5 new rules for the PhantomCard malware family. (#843)
+
+  * Document Enhancement
+
+    - Add an analysis report for the PhantomCard malware family. (#843)
+    - Optimize the Quark Script documents for CWE-749 and CWE-927. (#842 and #844)
+
+ --  Shaun Dang <pulorsok@gmail.com>  Mon, 05 Jan 2026 10:28:34 +0800
+
 quark-engine (25.12.1-0kali1) kali-dev; urgency=medium
 
   * Rule Enhancement
diff --git a/debian/control b/debian/control
index f6b40873..6b95747e 100644
--- a/debian/control
+++ b/debian/control
@@ -7,7 +7,7 @@ Build-Depends: debhelper-compat (= 12),
             dh-virtualenv (>= 0.8),
             python3,
 
-Standards-Version: 25.12.1
+Standards-Version: 26.1.1
 Homepage: https://github.com/quark-engine/quark-engine
 Vcs-Browser: https://github.com/quark-engine/quark-engine
 Vcs-Git: https://github.com/quark-engine/quark-engine
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 32c5c221..0ce13b34 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -22,7 +22,7 @@
 author = 'KunYu Chen, JunWei Song, YuShiang Dang, ShengFone Lu, AnWei Kung, ShunTe Lin, Vivek, Krishna'
 
 # The full version, including alpha/beta/rc tags
-release = 'v25.12.1'
+release = 'v26.1.1'
 
 # -- General configuration ---------------------------------------------------
 
diff --git a/quark/__init__.py b/quark/__init__.py
index 403a06e5..a582c304 100644
--- a/quark/__init__.py
+++ b/quark/__init__.py
@@ -1 +1 @@
-__version__ = "25.12.1"
+__version__ = "26.1.1"