diff --git a/src/WiFi101.h b/src/WiFi101.h
index 6e46fab1..33957418 100644
--- a/src/WiFi101.h
+++ b/src/WiFi101.h
@@ -21,7 +21,7 @@
 #define WIFI_H
 
 #define WIFI_FIRMWARE_LATEST_MODEL_A "19.4.4"
-#define WIFI_FIRMWARE_LATEST_MODEL_B "19.5.2"
+#define WIFI_FIRMWARE_LATEST_MODEL_B "19.5.4"
 
 // for backwards compatibility
 #define WIFI_FIRMWARE_REQUIRED WIFI_FIRMWARE_LATEST_MODEL_B