diff --git a/platformio.ini b/platformio.ini
index 18ff224..46f8a3c 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -98,7 +98,7 @@ board_build.partitions = esp32_partitions.csv
 lib_deps =
 	${env.lib_deps}
 	laxilef/ESP32Scheduler@^1.0.1
-nimble_lib = h2zero/NimBLE-Arduino@^2.3.6
+nimble_lib = h2zero/NimBLE-Arduino@2.3.3
 lib_ignore = 
 extra_scripts = 
 	post:tools/esp32.py