diff --git a/pyproject.toml b/pyproject.toml
index 497314d..435bca6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["hatchling", "hatch-vcs", "build", "twine"]
+requires = ["hatchling==1.29.0", "hatch-vcs==0.5.0", "build==1.4.0", "twine==6.2.0"]
 build-backend = "hatchling.build"
 
 [tool.pytest.ini_options]
@@ -29,7 +29,7 @@ classifiers = [
     "Operating System :: OS Independent",
     "Development Status :: 4 - Beta",
 ]
-dependencies = ["ruamel.yaml>=0.18.5"]
+dependencies = ["ruamel.yaml==0.19.1"]
 
 [project.urls]
 Homepage = "https://reqstool.github.io"