diff --git a/noxfile.py b/noxfile.py
index aaf1bc5..e170ee5 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -16,6 +16,7 @@
 
 TEST_DEPENDENCIES = [
     "flask",
+    "freezegun",
     "mock",
     "oauth2client",
     "pytest",