diff --git a/packages/mindplot/README.md b/packages/mindplot/README.md
index 7735674c..1b7da5fc 100644
--- a/packages/mindplot/README.md
+++ b/packages/mindplot/README.md
@@ -28,9 +28,9 @@ cd packages/mindplot
 
 To build up the package mindplot and use in production, you have to use command `yarn build`
 
-## Payground
+## Playground
 
-For the testings of mindplot you need use command `yarn payground` for run this enviroment.
+For the testings of mindplot you need use command `yarn playground` for run this enviroment.
 once this is done, it will open the explorer where you can see a menu with the tests carried out.
 
 ## Usage
diff --git a/packages/web2d/README.md b/packages/web2d/README.md
index c129a519..51fcde85 100644
--- a/packages/web2d/README.md
+++ b/packages/web2d/README.md
@@ -28,9 +28,9 @@ cd packages/web2d
 
 To build up the package web2d and use in production, you have to use command `yarn build`
 
-## Payground
+## Playground
 
-For the testings of web2d you need use command `yarn payground` for run this enviroment.
+For the testings of web2d you need use command `yarn playground` for run this enviroment.
 once this is done, it will open the explorer where you can see a menu with the tests carried out.
 
 ## Usage