diff --git a/devices/wt32_eth01.yaml b/devices/wt32_eth01.yaml
index 16a53ac..b10db76 100644
--- a/devices/wt32_eth01.yaml
+++ b/devices/wt32_eth01.yaml
@@ -8,12 +8,12 @@ i2c:
     sda: GPIO14
     scl: GPIO15
     scan: True
-    frequency: 100kHz
+    frequency: 400kHz
   - id: bus_b
     sda: GPIO17
     scl: GPIO33
     scan: True
-    frequency: 100kHz
+    frequency: 400kHz
 
 ethernet:
   id: eth