diff --git a/test-requirements.txt b/test-requirements.txt
index 3e33d214da..7ccce5795b 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -7,7 +7,7 @@
 # be installed in a specific order.
 #
 # Hacking should appear first in case something else depends on pep8
-hacking>=1.1.0 # Apache-2.0
+hacking>=1.1.0,<2 # Apache-2.0
 #
 astroid==2.1.0;python_version>='3.0' # LGPLv2.1
 bandit>=1.4.0 # Apache-2.0