diff --git a/pyproject.toml b/pyproject.toml
index b733b768c..45c7432c1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ dependencies = [
     'tomli>=2.0;python_version<"3.11"',
     "ruamel.yaml==0.18.6",
     "jsonschema>=4.18.0,<5.0",
-    "regress>=0.4.0",
+    "regress==0.4.5",
     "requests<3.0",
     "click>=8,<9",
 ]