diff --git a/platformio.ini b/platformio.ini
index 594d25f..7b008aa 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -15,22 +15,22 @@ src_dir                   = EspaperClient
 
 
 ; *** Uncomment one of the lines below to build/upload only one environment
-;env_default               = Espaper29Bw-PROD
-;env_default               = Espaper29Bw-TEST
-;env_default               = Espaper29Bw-DEV
-;env_default               = Espaper42Bw-PROD
-;env_default               = Espaper42Bw-TEST
-;env_default               = Espaper42Bw-DEV
-;env_default               = TTGOT529Bw-PROD
-;env_default               = TTGOT529Bw-TEST
-;env_default               = TTGOT529Bw-DEV
-;env_default               = Espaper75Bw-PROD
-env_default               = Espaper75Bw-TEST
-;env_default               = Espaper75Bw-DEV
-;env_default               = ESPColorKit-TEST
+; env_default               = Espaper29Bw-PROD
+; env_default               = Espaper29Bw-TEST
+; env_default               = Espaper29Bw-DEV
+; env_default               = Espaper42Bw-PROD
+; env_default               = Espaper42Bw-TEST
+; env_default               = Espaper42Bw-DEV
+; env_default               = TTGOT529Bw-PROD
+; env_default               = TTGOT529Bw-TEST
+; env_default               = TTGOT529Bw-DEV
+; env_default               = Espaper75Bw-PROD
+; env_default               = Espaper75Bw-TEST
+; env_default               = Espaper75Bw-DEV
+; env_default               = ESPColorKit-TEST
 
 [common]
-client_version            = -DCLIENT_VERSION=V030
+client_version            = -DCLIENT_VERSION=V031
 monitor_speed             = 115200
 upload_speed              = 921600
 upload_resetmethod        = nodemcu