diff --git a/README.md b/README.md
index a7c7701f..a721a103 100644
--- a/README.md
+++ b/README.md
@@ -225,7 +225,7 @@ Please have a look at [HOWTO Fix `Multiple Definitions` Linker Error](#howto-fix
 10. [`Arduino Core for STM32 v2.2.0+`](https://github.com/stm32duino/Arduino_Core_STM32) for STM32F/L/H/G/WB/MP1 boards. [![GitHub release](https://img.shields.io/github/release/stm32duino/Arduino_Core_STM32.svg)](https://github.com/stm32duino/Arduino_Core_STM32/releases/latest)
 11. [`ArduinoCore-mbed mbed_rp2040, mbed_nano, mbed_portenta core 3.0.1+`](https://github.com/arduino/ArduinoCore-mbed) for Arduino (Use Arduino Board Manager) **Portenta_H7, RP2040-based boards, such as Nano_RP2040_Connect, RASPBERRY_PI_PICO**. [![GitHub release](https://img.shields.io/github/release/arduino/ArduinoCore-mbed.svg)](https://github.com/arduino/ArduinoCore-mbed/releases/latest)
 12. [`Earle Philhower's arduino-pico core v1.13.1+`](https://github.com/earlephilhower/arduino-pico) for RP2040-based boards such as **RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040**, etc. [![GitHub release](https://img.shields.io/github/release/earlephilhower/arduino-pico.svg)](https://github.com/earlephilhower/arduino-pico/releases/latest)
-13. [`Teensy core v1.55+`](https://www.pjrc.com/teensy/td_download.html) for Teensy (4.1, 4.0, 3.6, 3.5, 3,2, 3.1, 3.0) boards.
+13. [`Teensy core v1.56+`](https://www.pjrc.com/teensy/td_download.html) for Teensy (4.1, 4.0, 3.6, 3.5, 3,2, 3.1, 3.0) boards.
 
 14. Depending on which Ethernet card you're using:
    - [`Ethernet_Generic library v2.0.1+`](https://github.com/khoih-prog/Ethernet_Generic) for W5100, W5200 and W5500/WIZ550io/WIZ850io/USR-ES1 with Wiznet W5500 chip.  [![GitHub release](https://img.shields.io/github/release/khoih-prog/Ethernet_Generic.svg)](https://github.com/khoih-prog/Ethernet_Generic/releases/latest)