diff --git a/platformio.ini b/platformio.ini
index e4c322ba..fde67eb4 100755
--- a/platformio.ini
+++ b/platformio.ini
@@ -4,10 +4,10 @@ extra_configs = platformio-user.ini
 
 [common]
 framework = arduino
-lib_deps = HanReader@1.0.0, ArduinoJson@6.14.1, MQTT@^2.4.7, DallasTemperature@3.8.1, EspSoftwareSerial@6.7.1, Base64@^1.0.0
+lib_deps = HanReader@1.0.0, ArduinoJson@6.14.1, MQTT@2.4.7, DallasTemperature@3.8.1, EspSoftwareSerial@6.7.1, Base64@1.0.0
 
 [env:hw1esp12e]
-platform = espressif8266
+platform = espressif8266@2.3.3
 board = esp12e
 framework = ${common.framework}
 lib_deps = ${common.lib_deps}
@@ -18,7 +18,7 @@ extra_scripts =
     scripts/makeweb.py
 
 [env:esp12e]
-platform = espressif8266
+platform = espressif8266@2.3.3
 board = esp12e
 framework = ${common.framework}
 lib_deps = ${common.lib_deps}
@@ -27,7 +27,7 @@ extra_scripts =
     scripts/makeweb.py
 
 [env:d1mini]
-platform = espressif8266
+platform = espressif8266@2.3.3
 board = d1_mini
 framework = ${common.framework}
 lib_deps = ${common.lib_deps}
@@ -36,7 +36,7 @@ extra_scripts =
     scripts/makeweb.py
 
 [env:esp32]
-platform = espressif32
+platform = espressif32@1.11.2
 board = esp32dev
 framework = ${common.framework}
 lib_deps = ${common.lib_deps}
@@ -45,7 +45,7 @@ extra_scripts =
     scripts/makeweb.py
 
 [env:lolind32]
-platform = espressif32
+platform = espressif32@1.11.2
 board = lolin_d32
 framework = ${common.framework}
 lib_deps = ${common.lib_deps}
@@ -54,7 +54,7 @@ extra_scripts =
     scripts/makeweb.py
 
 [env:featheresp32]
-platform = espressif32
+platform = espressif32@1.11.2
 board = featheresp32
 framework = ${common.framework}
 lib_deps = ${common.lib_deps}