diff --git a/components/pcf8574/pcf8574.c b/components/pcf8574/pcf8574.c
index 4f108f0..aad9f1a 100644
--- a/components/pcf8574/pcf8574.c
+++ b/components/pcf8574/pcf8574.c
@@ -50,7 +50,9 @@ esp_err_t pcf8574_init_desc(i2c_dev_t *dev, i2c_port_t port, uint8_t addr, gpio_
     dev->port = port;
     dev->addr = addr;
     dev->cfg.sda_io_num = sda_gpio;
+    dev->cfg.sda_pullup_en = GPIO_PULLUP_ENABLE;
     dev->cfg.scl_io_num = scl_gpio;
+    dev->cfg.scl_pullup_en = GPIO_PULLUP_ENABLE;
 #if HELPER_TARGET_IS_ESP32
     dev->cfg.master.clk_speed = I2C_FREQ_HZ;
 #endif