diff --git a/docs/source/development/developer_guidelines.md b/docs/source/development/developer_guidelines.md
index dd94c57..e32b53a 100644
--- a/docs/source/development/developer_guidelines.md
+++ b/docs/source/development/developer_guidelines.md
@@ -21,7 +21,7 @@ This allows you to run the auto-archiver without the `poetry run` prefix.
 ### Optional Development Packages
 
 Install development packages (used for unit tests etc.) using:
-`poetry install -with dev`
+`poetry install --with dev`
 
 
 ```{toctree}
@@ -33,4 +33,4 @@ docs
 release
 settings_page
 style_guide
-```
\ No newline at end of file
+```