diff --git a/analysis/classes/zeekengine.py b/analysis/classes/zeekengine.py
index 1aa2338..87ff7a4 100644
--- a/analysis/classes/zeekengine.py
+++ b/analysis/classes/zeekengine.py
@@ -397,7 +397,7 @@ class ZeekEngine(object):
                 # This check can be good if the domain has already been cached by
                 # the device so it wont appear in self.dns.
 
-                if any([cert["cn"].endswith(r["domain"]) for r in self.dns]):
+                if any(cert["cn"].endswith(r["domain"]) for r in self.dns):
                     continue
 
                 for domain in self.bl_domains: