diff --git a/requirements.txt b/requirements.txt
index dbf6d5f..7ad0a6f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
-pyparsing>=1.5.5
+pyparsing>=1.5.5,<=2.4.7
 cached-property>=1.2.0
 argparse>=1.4.0
 six>=1.1.0
 Jinja2>=2.8
-ConfigArgParse>=0.11.0
\ No newline at end of file
+ConfigArgParse>=0.11.0