diff --git a/requirements.txt b/requirements.txt
index bebc790..c6c49c9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-bottle==0.12.19
+bottle==0.12.20
 pyspark==2.3.2
 antlr4-python3-runtime==4.7.1
 numpy