diff --git a/pyproject.toml b/pyproject.toml
index 68cc29c..8332f9c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ packages = [{include = "tom_tns"}]
 
 [tool.poetry.dependencies]
 python = "^3.8.1,<3.12"
-tomtoolkit = "^2.18"
+tomtoolkit = ">=2.20.0"
 
 [tool.poetry.group.lint.dependencies]
 flake8 = ">=6.0,<7.2"