diff --git a/src/main/resources/mapper/UserStatsMapper.xml b/src/main/resources/mapper/UserStatsMapper.xml
new file mode 100644
index 0000000..3560a39
--- /dev/null
+++ b/src/main/resources/mapper/UserStatsMapper.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+
+<mapper namespace="com.example.g8backend.mapper.UserStatsMapper">
+    <update id="incrementTraffic">
+        UPDATE user_stats
+        SET total_upload = total_upload + #{deltaUploaded},
+            total_download = total_download + #{deltaDownloaded}
+        WHERE passkey = #{passkey}
+    </update>
+</mapper>
\ No newline at end of file