diff --git a/drivers/tildagon_i2c/tildagon_i2c.h b/drivers/tildagon_i2c/tildagon_i2c.h
index 98b281c..7cb42e1 100644
--- a/drivers/tildagon_i2c/tildagon_i2c.h
+++ b/drivers/tildagon_i2c/tildagon_i2c.h
@@ -11,7 +11,7 @@
 
 #define TILDAGON_HOST_I2C_SDA (45)
 #define TILDAGON_HOST_I2C_SCL (46)
-#define TILDAGON_HOST_I2C_FREQ (400000)
+#define TILDAGON_HOST_I2C_FREQ (133000)
 #define TILDAGON_HOST_I2C_PORT (0)
 #define TILDAGON_HOST_I2C_TIMEOUT (50000)
 
@@ -20,4 +20,4 @@ const tca9548a_i2c_mux_t *tildagon_get_i2c_mux();
 void tildagon_i2c_init();
 
 
-#endif // _MICROPY_PY_TILDAGON_I2C
\ No newline at end of file
+#endif // _MICROPY_PY_TILDAGON_I2C