diff --git a/tox.ini b/tox.ini
index c1d23cf..f66e683 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ python =
     3.9: python3.9
 
 [testenv]
-deps = -rrequirements_dev.txt
+deps = -r requirements_dev.txt
 commands = 
     # stop the build if there are Python syntax errors or undefined names
     flake8 src --count --select=E9,F63,F7,F82 --show-source --statistics
@@ -19,4 +19,4 @@ commands =
     # pytest unit
     pytest -v tests/unit
     # pytest integration
-    pytest -v tests/integration
\ No newline at end of file
+    pytest -v tests/integration