diff --git a/requirements_py27_dev.txt b/requirements_py27_dev.txt
index 1a293f4..fff0915 100644
--- a/requirements_py27_dev.txt
+++ b/requirements_py27_dev.txt
@@ -8,7 +8,7 @@ backports-abc==0.5
 backports.functools-lru-cache==1.3
 backports.shutil-get-terminal-size==1.0.0
 bleach==1.5.0
-bottle==0.12.13
+bottle==0.12.20
 certifi==2017.1.23
 configparser==3.5.0
 coverage==4.3.4
diff --git a/requirements_py3_dev.txt b/requirements_py3_dev.txt
index d1c99f0..f115d2b 100644
--- a/requirements_py3_dev.txt
+++ b/requirements_py3_dev.txt
@@ -7,7 +7,7 @@ Babel==2.3.4
 backports-abc==0.5
 backports.shutil-get-terminal-size==1.0.0
 bleach==1.5.0
-bottle==0.12.13
+bottle==0.12.20
 certifi==2017.1.23
 configparser==3.5.0
 coverage==4.3.4