diff --git a/tox.ini b/tox.ini
index 4ffe5289c3..62e068313c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,7 +12,7 @@ whitelist_externals =
   bash
   find
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
+  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
 commands = {[unit_tests]commands}
@@ -139,7 +139,7 @@ commands =
 basepython = python3
 # We need to install horizon dependecies to build module references
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
+  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/doc/requirements.txt
 commands =
@@ -210,4 +210,4 @@ max-line-length = 80
 # Disable some doc8 checks:
 # D000: Check RST validity
 # - cannot handle "none" for code-block directive
-ignore = D000
+ignore = D000
\ No newline at end of file