diff --git a/requirements.txt b/requirements.txt
index f954de2a31..7a552253fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ django >= 1.8, < 1.9
 twisted >= 15.2.1
 mock >= 1.0.1
 pillow
+pytz
diff --git a/win_requirements.txt b/win_requirements.txt
index 2a41902909..82d1b2c23c 100644
--- a/win_requirements.txt
+++ b/win_requirements.txt
@@ -7,3 +7,4 @@ django >= 1.8, < 1.9
 twisted >= 15.2.1
 mock >= 1.0.1
 pillow
+pytz