diff --git a/library.json b/library.json
index a027b7c..2a4d8f4 100644
--- a/library.json
+++ b/library.json
@@ -10,7 +10,7 @@
         "url": "https://github.com/M5Stack/M5Module-QRCode.git"
     },
     "dependencies": {
-        "M5Unified": "*",
+        "M5Unified": ">=0.2.21",
         "M5GFX": "*"
     },
     "version": "1.0.1",
diff --git a/library.properties b/library.properties
index 5fbffff..172d6ca 100644
--- a/library.properties
+++ b/library.properties
@@ -8,4 +8,4 @@ category=Device Control
 url=https://github.com/m5stack/M5Module-QRCode.git
 architectures=esp32
 includes=M5ModuleQRCode.h
-depends=M5Unified
+depends=M5Unified (>=0.2.21)
diff --git a/src/M5ModuleQRCode.cpp b/src/M5ModuleQRCode.cpp
index 30f40e2..9fabfed 100644
--- a/src/M5ModuleQRCode.cpp
+++ b/src/M5ModuleQRCode.cpp
@@ -64,13 +64,11 @@ bool M5ModuleQRCode::_init_pi4ioe5v6408()
     _LOG_DEBUG("pi4ioe5v6408 found at 0x%02x\n", _config.pi4ioe5v6408_addr);
 
     _pi4ioe5v6408->setDirection(CHANNEL_QRCODE_POWER_EN, true);
-    _pi4ioe5v6408->setPullMode(CHANNEL_QRCODE_POWER_EN, true);
-    _pi4ioe5v6408->enablePull(CHANNEL_QRCODE_POWER_EN, true);
+    _pi4ioe5v6408->setPullMode(CHANNEL_QRCODE_POWER_EN, m5::IOExpander_Base::pull_up);
     _pi4ioe5v6408->setHighImpedance(CHANNEL_QRCODE_POWER_EN, false);
 
     _pi4ioe5v6408->setDirection(CHANNEL_QRCODE_TRIG, true);
-    _pi4ioe5v6408->setPullMode(CHANNEL_QRCODE_TRIG, true);
-    _pi4ioe5v6408->enablePull(CHANNEL_QRCODE_TRIG, true);
+    _pi4ioe5v6408->setPullMode(CHANNEL_QRCODE_TRIG, m5::IOExpander_Base::pull_up);
     _pi4ioe5v6408->setHighImpedance(CHANNEL_QRCODE_TRIG, false);
 
     return true;