diff --git a/requirements.txt b/requirements.txt
index 1aaebc4ba3f4ea61ab37989541b04bb4267bdea2..2c1ad0da9a2d3f48e5da2c3d0ca260802cea665a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 km3pipe
 flask
+frozen-flask
 gunicorn