diff --git a/platformio.ini b/platformio.ini
index adfcc3e1..3d1eda59 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -51,7 +51,7 @@ extra_scripts = pre:build.py
 otakeyfile = ota.conf
 lorakeyfile = loraconf.h
 lmicconfigfile = lmic_config.h
-platform_espressif32 = espressif32@1.10.0
+platform_espressif32 = espressif32@1.9.0
 monitor_speed = 115200
 upload_speed = 115200
 lib_deps_lora =