diff --git a/MD/MembraneLook/requirements.txt b/MD/MembraneLook/requirements.txt
index 43e2603..e88559e 100644
--- a/MD/MembraneLook/requirements.txt
+++ b/MD/MembraneLook/requirements.txt
@@ -26,7 +26,7 @@ bokeh==1.0.4
 boto==2.49.0
 boto3==1.9.86
 botocore==1.12.86
-bottle==0.12.16
+bottle==0.12.20
 Bottleneck==1.2.1
 bz2file==0.98
 cachetools==3.1.0