diff --git a/requirements.txt b/requirements.txt
index 7b93181..941e132 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ plaster-pastedeploy==0.7
 prettytable==0.7.2
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
-pycparser==2.19
+pycparser==2.20
 pyramid==1.10.4
 pyramid-multiauth==0.9.0
 pyramid-tm==2.4