diff --git a/setup.cfg b/setup.cfg
index 51ec54a4..fcbfd674 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -40,6 +40,7 @@ install_requires =
     pyjwt>=1.5.0
     simplekv>=0.11.2
     ua-parser>=0.7.3
+    wtforms<3.2.0
 
 [options.extras_require]
 admin =