diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 65c9cd1..c289ff2 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -13,7 +13,7 @@ repos:
   hooks:
   - id: isort
 
-- repo: https://gitlab.com/PyCQA/flake8
+- repo: https://github.com/PyCQA/flake8
   rev: 4.0.1
   hooks:
   - id: flake8
diff --git a/requirements/requirements_tests.txt b/requirements/requirements_tests.txt
index f6de369..a250aaf 100644
--- a/requirements/requirements_tests.txt
+++ b/requirements/requirements_tests.txt
@@ -3,3 +3,4 @@ pytest-cov>=3.0.0
 ansys-api-platform-instancemanagement>=1.0.0b1
 grpcio-testing
 grpcio-health-checking
+six~=1.16
\ No newline at end of file