diff --git a/test-requirements.txt b/test-requirements.txt
index b90077d..8acd21b 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -14,4 +14,4 @@ greenlet>=0.4.15 # MIT
 coverage!=4.4,>=4.0 # Apache-2.0
 
 # Bandit security code scanner
-bandit>=1.1.0 # Apache-2.0
+bandit>=1.6.0,<1.7.0 # Apache-2.0