typo

sveinugu · sveinugu · commit ac83df1f93cf · 2023-09-29T15:19:55.000+02:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -19,7 +19,7 @@
 
 - If a dependency is not updated to the latest version available on Pypi, you might need to clear
   the pip cache of poetry:
-  - `poetry cache clear pypi -all`
+  - `poetry cache clear pypi --all`
 
 ### For mypy support in PyCharm
 
