diff --git a/requirements_dev.txt b/requirements_dev.txt
index eb17b0a..c6fb7cc 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -45,7 +45,7 @@ psycopg2==2.7.4
 punch.py==1.5.0
 py==1.5.3
 pycodestyle==2.3.1
-pycparser==2.18
+pycparser==2.20
 pydocstyle==2.1.1
 pyflakes==2.0.0
 pygments==2.2.0