diff --git a/requirements.txt b/requirements.txt
index 495d438..20e7e58 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-bottle==0.12.19
+bottle==0.12.20
 linecache2==1.0.0
 Markdown==2.6.2
 -e git+https://github.com/ohbarye/markdown-server@f85a63ba06ca7cb5beb59bd96153d7ba1fa867ae#egg=markdownserver-master