diff --git a/python-k8sapp-portieris/k8sapp_portieris/tox.ini b/python-k8sapp-portieris/k8sapp_portieris/tox.ini
index 2ec4e55..4a130c3 100644
--- a/python-k8sapp-portieris/k8sapp_portieris/tox.ini
+++ b/python-k8sapp-portieris/k8sapp_portieris/tox.ini
@@ -20,8 +20,7 @@ sitepackages = False
 whitelist_externals = bash
                       find
 
-install_command = pip install \
-    -v -v -v --use-deprecated legacy-resolver \
+install_command = pip install -v -v -v \
     -c{toxinidir}/upper-constraints.txt \
     -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/stable/stein/upper-constraints.txt} \
     {opts} {packages}
@@ -73,8 +72,7 @@ commands =
 
 [testenv:py39]
 basepython = python3.9
-install_command = pip install \
-    -v -v -v --use-deprecated legacy-resolver \
+install_command = pip install -v -v -v \
     -c{toxinidir}/upper-constraints.txt \
     -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/starlingx/root/raw/branch/master/build-tools/requirements/debian/upper-constraints.txt} \
     {opts} {packages}