diff --git a/.devcontainer/dev-dependencies.sh b/.devcontainer/dev-dependencies.sh
old mode 100644
new mode 100755
index 4158dba6..b5813b1a
--- a/.devcontainer/dev-dependencies.sh
+++ b/.devcontainer/dev-dependencies.sh
@@ -4,5 +4,5 @@
 
 # install poetry
 pip install poetry --user
-# Install dependencies (include --dev for tests/development)
-poetry install --dev
+# Install dependencies
+python -m poetry install --with dev
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 2501ea58..18ae64f3 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -4,6 +4,5 @@
     "dockerfile": "dodona-tested.dockerfile",
     "context": "."
   },
-  // install dev dependencies
-  "postCreateCommand": "pip install poetry --user; python -m poetry install --with dev"
+  "postCreateCommand": "./.devcontainer/dev-dependencies.sh",
 }