diff --git a/requirements.txt b/requirements.txt
index 792922d..f7af3c2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ multidict==4.5.2
 pep8==1.7.1
 pluggy==0.11.0
 py==1.10.0
-pycparser==2.19
+pycparser==2.20
 PyNaCl==1.3.0
 pytest==4.4.2
 pytest-cov==2.7.1