diff --git a/docs/requirements.txt b/docs/requirements.txt
index 443d8dd2..21e247a4 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -5,5 +5,7 @@ Flask-WTF==0.12
 flask-restplus==0.8.6
 Flask-Cache==0.13.1
 WTForms==2.0.2
+arrow==0.7.0
+tzlocal==1.2
 sphinxcontrib-httpdomain==1.3.0
 six==1.10.0
diff --git a/requirements.txt b/requirements.txt
index de4af3e6..9dde24d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,6 @@ Flask-WTF==0.12
 flask-restplus==0.8.6
 Flask-Cache==0.13.1
 WTForms==2.0.2
+arrow==0.7.0
+tzlocal==1.2
 six==1.10.0