diff --git a/data_analysis/audiocommons_ffont/requirements.txt b/data_analysis/audiocommons_ffont/requirements.txt
index da6b5e6..902d311 100644
--- a/data_analysis/audiocommons_ffont/requirements.txt
+++ b/data_analysis/audiocommons_ffont/requirements.txt
@@ -9,7 +9,7 @@ scipy==0.16.1
 seaborn==0.6.0
 six==1.10.0
 pyzmq>=13
-tornado==4.3
+tornado==6.3.2
 jsonschema==2.5.1
 jupyter==1.0.0
 Cython