diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 73e505b..8172a1b 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -10,7 +10,7 @@ source:
   sha256: c4efd70aeb072725e683bca1c2de8173cd577018a7a5c3795886a5691e70bc37
 
 build:
-  number: 0
+  number: 1
   noarch: python
   script: {{ PYTHON }} -m pip install . -vv
   entry_points:
@@ -37,7 +37,7 @@ requirements:
     - sortedcontainers !=2.0.0,!=2.0.1
     - tblib >=1.6.0
     - toolz >=0.8.2
-    - tornado >=6.0.3
+    - tornado >=6.0.3,<6.2
     - urllib3
     - zict >=0.1.3
   run_constrained: