diff --git a/setup.py b/setup.py
index 4c6810a..3c1aa8f 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@ install_requires = [
     f'acme>={version}',
     f'certbot>={version}',
     'PyOpenSSL>=17.3.0',
-    'pyparsing>=2.2.0',
+    'pyparsing>=2.1.10',
     'setuptools>=39.0.1',
 ]