diff --git a/plantuml-c4-structurizr.adoc b/plantuml-c4-structurizr.adoc
index 40469ad..267a374 100644
--- a/plantuml-c4-structurizr.adoc
+++ b/plantuml-c4-structurizr.adoc
@@ -10,7 +10,7 @@
 brew install structurizr-cli
 ```
 
-*use structuralizr-cli to transform structurizr domain-specific language to PlantUML format*
+*use structuralizr-cli to transform structurizr domain-specific language (.dsl) to PlantUML format*
 
 ```
 ./structurizr.sh export -workspace ~/opt/_adoc/non.adoc/workspace.dsl -format plantuml