diff --git a/requirements.txt b/requirements.txt
index ff7c39067..fac11e552 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,4 +9,5 @@ pybind11>=2.6.0rc3
 pylint
 pyyaml>=3.11
 six
+toml
 typed_ast
diff --git a/setup.cfg b/setup.cfg
index 093a7c8f4..ca28e7d92 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -36,6 +36,7 @@ install_requires =
     ninja>=1.10.0.post2
     pyyaml>=3.11
     six
+    toml
     typed_ast
 
 [options.packages.find]