diff --git a/pyproject.toml b/pyproject.toml
index a340a21..0325a8c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,8 @@ authors = [
 
 # Base runtime dependencies
 dependencies = [
-  "PyYAML>=6.0"
+  "PyYAML>=6.0",
+  "tomli; python_version < \"3.11\"",
 ]
 
 [project.urls]