diff --git a/README.md b/README.md
index 104a19c2..eeef0bc0 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# 1. Developement environment preparing
+# 1. Development environment preparation
 
    1. install `"Arduino Software IDE"` for your preferred operating system  
 `https://www.arduino.cc -> Software->Downloads`