diff --git a/setup.py b/setup.py
index 3b595402..8f959ba3 100644
--- a/setup.py
+++ b/setup.py
@@ -54,7 +54,7 @@
             "pytest",
             "pytest-cov",
             "pytest-mock",
-            "substratools>=0.19.0",
+            "substratools>=0.18.0",
             "black",
             "flake8",
             "isort",