diff --git a/requirements-pinned.txt b/requirements-pinned.txt
index 0d1681f1..15519600 100644
--- a/requirements-pinned.txt
+++ b/requirements-pinned.txt
@@ -3,7 +3,7 @@ cffi==1.15.0              # via cryptography, pynacl
 charset-normalizer==2.0.11 # via requests
 cryptography==36.0.1      # via securesystemslib
 idna==3.3                 # via requests
-pycparser==2.20           # via cffi
+pycparser==2.21           # via cffi
 pynacl==1.5.0             # via securesystemslib
 requests==2.27.1
 securesystemslib[crypto,pynacl]==0.21.0