diff --git a/platformio.ini b/platformio.ini
index 80148ece..fd717815 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@1.11.0
+platform_espressif32 = espressif32@1.8.0
 monitor_speed = 115200
 upload_speed = 115200
 lib_deps_lora =
diff --git a/src/lmic_config.h b/src/lmic_config.h
index e668bc70..18b3c6b3 100644
--- a/src/lmic_config.h
+++ b/src/lmic_config.h
@@ -88,7 +88,7 @@
 // implementation is optimized for speed on 32-bit processors using
 // fairly big lookup tables, but it takes up big amounts of flash on the
 // AVR architecture.
-#define USE_ORIGINAL_AES
+//#define USE_ORIGINAL_AES
 //
 // This selects the AES implementation written by Ideetroon for their
 // own LoRaWAN library. It also uses lookup tables, but smaller