diff --git a/requirements.txt b/requirements.txt
index f8d8ec98..0f063825 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 pbr<2.0,>=1.6
 flask
-subunit2sql>=0.11.0
+subunit2sql>=0.11.0,<1.0.0
 sqlalchemy
 flask-jsonpify
 PyMySQL>=0.6.2