diff --git a/README.md b/README.md
index 41e68491c1730b33f1e9b6f0cbe96213f2283145..bb91d53ceda75cb18ca43b21936d5568b4ad4942 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@
   * PWM generation
   * Encoder mode
 * SPI
-* I^2C
+* I²C
 The peripheral pin configuration should match the standard Arduino headers.
 
 4. The stm32f4 supports higher clock frequency than the default 16 MHz. Implement a simple way of setting it to the maximum of 84 MHz for the stm32f401re and 100 MHz for the stm32f411re, or any valid lower value (configured using the PLL).