diff --git a/requirements.txt b/requirements.txt
index c494b3d..20fe4f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,7 @@ hysteria
 ujson
 pybase64
 pyqrcode
+pypng
 sysproxy; sys_platform == "win32"
 darkdetect; sys_platform != "darwin"
 darkdetect[macos-listener]; sys_platform == "darwin"
diff --git a/setup.py b/setup.py
index 3192a05..6f8fd81 100644
--- a/setup.py
+++ b/setup.py
@@ -25,6 +25,7 @@ setup(
         'ujson',
         'pybase64',
         'pyqrcode',
+        'pypng',
         'sysproxy; sys_platform == "win32"',
         'darkdetect; sys_platform != "darwin"',
         'darkdetect[macos-listener]; sys_platform == "darwin"',