diff --git a/.devcontainer/dev_install b/.devcontainer/dev_install
index ec69cdae..e5635f66 100755
--- a/.devcontainer/dev_install
+++ b/.devcontainer/dev_install
@@ -7,7 +7,7 @@ cd /workspace
 python -m pip install --upgrade pip
 
 # install or upgrade dependencies for development and testing
-pip install --upgrade -r requirements-dev.txt
+pip install --no-deps --upgrade -r requirements-dev.txt
 
 # install the package itself in edit mode:
 pip install -e .