diff --git a/platformio.ini b/platformio.ini
index 517ece3..7887036 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -11,15 +11,15 @@
 
 [common_env_data]
 lib_deps_embedded_external =
-  I2Cdevlib-MPU6050
+  https://github.com/tzapu/WiFiManager#v2.0.15-rc.1
+  jrowberg/I2Cdevlib-MPU6050#c4e96ebba8b6b77d93c478d501c077fd6c0421ad
   Brzo I2C@1.3.2
-  https://github.com/tzapu/WiFiManager
-  ArduinoJson
+  bblanchon/ArduinoJson@6.13.0
   electroniccats/MPU6050@^0.5.0
 
 
 [env:wemos]
-platform = espressif8266
+platform = espressif8266@4.1.0
 framework = arduino
 board = esp01_1m
 #upload_resetmethod = nodemcu