diff --git a/src/summarycode/summarizer.py b/src/summarycode/summarizer.py
index c8691056428..ea7619ef95b 100644
--- a/src/summarycode/summarizer.py
+++ b/src/summarycode/summarizer.py
@@ -8,6 +8,7 @@
 #
 
 from collections import defaultdict
+import warnings
 
 import attr
 import fingerprints
@@ -28,6 +29,7 @@
 TRACE = False
 TRACE_LIGHT = False
 
+warnings.simplefilter('ignore', UnicodeWarning)
 
 def logger_debug(*args):
     pass