diff --git a/requirements.txt b/requirements.txt
index 6b27b14..753da25 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ MarkupSafe==2.0.1
 mypy-extensions==0.4.3
 pathspec==0.9.0
 platformdirs==2.4.0
-pycparser==2.20
+pycparser==2.21
 PyJWT==2.3.0
 pyrsistent==0.18.0
 regex==2021.11.2