diff --git a/setup.py b/setup.py
index 62db8afc..70419838 100755
--- a/setup.py
+++ b/setup.py
@@ -50,7 +50,7 @@
 
     install_requires=[
         'ruamel.yaml>0.15.69',
-        'jsonschema>=4.1.2',
+        'jsonschema >=4.1.2, <4.18',
         'rfc3987',
         'pylibfdt',
     ],