diff --git a/Adafruit_TSL2591.cpp b/Adafruit_TSL2591.cpp
index 62ed241..2358e33 100644
--- a/Adafruit_TSL2591.cpp
+++ b/Adafruit_TSL2591.cpp
@@ -74,9 +74,9 @@ Adafruit_TSL2591::Adafruit_TSL2591(int32_t sensorID) {
 */
 /**************************************************************************/
 boolean Adafruit_TSL2591::begin(TwoWire *theWire, uint8_t addr) {
-  _i2c = theWire;
-  _i2c->begin();
-  _addr = addr;
+  i2c_dev = new Adafruit_I2CDevice(addr, theWire);
+  if (!i2c_dev->begin())
+    return false;
 
   /*
   for (uint8_t i=0; i<0x20; i++)
@@ -476,44 +476,28 @@ void Adafruit_TSL2591::getSensor(sensor_t *sensor) {
 /*******************************************************/
 
 uint8_t Adafruit_TSL2591::read8(uint8_t reg) {
-  uint8_t x;
-
-  _i2c->beginTransmission(_addr);
-  _i2c->write(reg);
-  _i2c->endTransmission();
-
-  _i2c->requestFrom(_addr, 1);
-  x = _i2c->read();
-
-  return x;
+  uint8_t buffer[1];
+  buffer[0] = reg;
+  i2c_dev->write_then_read(buffer, 1, buffer, 1);
+  return buffer[0];
 }
 
 uint16_t Adafruit_TSL2591::read16(uint8_t reg) {
-  uint16_t x;
-  uint16_t t;
-
-  _i2c->beginTransmission(_addr);
-  _i2c->write(reg);
-  _i2c->endTransmission();
-
-  _i2c->requestFrom(_addr, 2);
-  t = _i2c->read();
-  x = _i2c->read();
-
-  x <<= 8;
-  x |= t;
-  return x;
+  uint8_t buffer[2];
+  buffer[0] = reg;
+  i2c_dev->write_then_read(buffer, 1, buffer, 2);
+  return uint16_t(buffer[1]) << 8 | uint16_t(buffer[0]);
 }
 
 void Adafruit_TSL2591::write8(uint8_t reg, uint8_t value) {
-  _i2c->beginTransmission(_addr);
-  _i2c->write(reg);
-  _i2c->write(value);
-  _i2c->endTransmission();
+  uint8_t buffer[2];
+  buffer[0] = reg;
+  buffer[1] = value;
+  i2c_dev->write(buffer, 2);
 }
 
 void Adafruit_TSL2591::write8(uint8_t reg) {
-  _i2c->beginTransmission(_addr);
-  _i2c->write(reg);
-  _i2c->endTransmission();
+  uint8_t buffer[1];
+  buffer[0] = reg;
+  i2c_dev->write(buffer, 1);
 }
diff --git a/Adafruit_TSL2591.h b/Adafruit_TSL2591.h
index b7f2664..1a9e480 100644
--- a/Adafruit_TSL2591.h
+++ b/Adafruit_TSL2591.h
@@ -19,9 +19,9 @@
 #ifndef _TSL2591_H_
 #define _TSL2591_H_
 
+#include <Adafruit_I2CDevice.h>
 #include <Adafruit_Sensor.h>
 #include <Arduino.h>
-#include <Wire.h>
 
 #define TSL2591_VISIBLE (2)      ///< (channel 0) - (channel 1)
 #define TSL2591_INFRARED (1)     ///< channel 1
@@ -157,7 +157,7 @@ class Adafruit_TSL2591 : public Adafruit_Sensor {
   void getSensor(sensor_t *);
 
 private:
-  TwoWire *_i2c;
+  Adafruit_I2CDevice *i2c_dev = NULL; ///< Pointer to I2C bus interface
 
   void write8(uint8_t r);
   void write8(uint8_t r, uint8_t v);
diff --git a/library.properties b/library.properties
index 409eca2..d061bd7 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=Adafruit TSL2591 Library
-version=1.3.1
+version=1.4.0
 author=Adafruit
 maintainer=Adafruit <info@adafruit.com>
 sentence=Library for the TSL2591 digital luminosity (light) sensors.
@@ -7,4 +7,4 @@ paragraph=Library for the TSL2591 digital luminosity (light) sensors.
 category=Sensors
 url=https://github.com/adafruit/Adafruit_TSL2591_Library
 architectures=*
-depends=Adafruit Unified Sensor
+depends=Adafruit Unified Sensor, Adafruit BusIO