diff --git a/requirements.txt b/requirements.txt
index c189d5a8de..919f4425e1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ yamlordereddictloader
 prompt_toolkit>=2.0.7
 tqdm
 mwclient==0.8.1
-jsonschema>=3.2.0
+jsonschema<4.0.0,>=3.2.0
 twine>=1.13.0
 wheel>=0.34.2
 ruamel.yaml>=0.15