diff --git a/HISTORY.rst b/HISTORY.rst
index 87bb2790..b57251c7 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -1,3 +1,12 @@
+======================
+ What's new in 2.2.3
+======================
+
+Release: 2024-02-04
+
+* Fix ``Connection.kill()`` method that broken in 2.2.2. (#689)
+
+
 ======================
  What's new in 2.2.2
 ======================
diff --git a/src/MySQLdb/_mysql.c b/src/MySQLdb/_mysql.c
index 8ea32e08..c334db66 100644
--- a/src/MySQLdb/_mysql.c
+++ b/src/MySQLdb/_mysql.c
@@ -1797,8 +1797,9 @@ _mysql_ConnectionObject_kill(
     char query[50];
     if (!PyArg_ParseTuple(args, "k:kill", &pid)) return NULL;
     check_connection(self);
+    snprintf(query, 50, "KILL %lu", pid);
     Py_BEGIN_ALLOW_THREADS
-    r = mysql_query(&(self->connection), snprintf(query, 50, "KILL %d", pid));
+    r = mysql_query(&(self->connection), query);
     Py_END_ALLOW_THREADS
     if (r) return _mysql_Exception(self);
     Py_RETURN_NONE;
diff --git a/src/MySQLdb/release.py b/src/MySQLdb/release.py
index 614020dc..6bc1089f 100644
--- a/src/MySQLdb/release.py
+++ b/src/MySQLdb/release.py
@@ -1,3 +1,3 @@
 __author__ = "Inada Naoki <songofacandy@gmail.com>"
-__version__ = "2.2.2"
-version_info = (2, 2, 2, "final", 0)
+__version__ = "2.2.3"
+version_info = (2, 2, 3, "final", 0)