diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3ada971beb52a5aaa08b8e2c516134e40e5b8c00..42907cb985e275964139fbf8685c0bb114a52478 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,7 +7,7 @@ stages:
   - test
   - build
 before_script:
-  - pip install tox==2.9.1
+  - pip install tox==4.5.1
 
 pep8:
   stage: check_style
diff --git a/tox.ini b/tox.ini
index a18820008861af822883689de353c8b9555f8b99..e24177c95e3758524451a7729e333013b0b5804c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,8 +18,8 @@ commands =
 
 [testenv:tests]
 deps =
-    -r requirements.txt
-    -r requirements.dev.txt
+    -rrequirements.txt
+    -rrequirements.dev.txt
 basepython = python3.8
 commands =
     pytest tests/