diff --git a/docs/guide/index.rst b/docs/guide/index.rst
index a05dbf0..27b0a3e 100644
--- a/docs/guide/index.rst
+++ b/docs/guide/index.rst
@@ -12,7 +12,7 @@ There are a few things that you should know while writing transformations graphs
     purity
     transformations
     services
-    envrionmental_variables
+    envrionment_variables
 
 Third party integrations
 ::::::::::::::::::::::::