diff --git a/python/requirements.txt b/python/requirements.txt
index 44ee760eefd..502c2821a6b 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -5,7 +5,7 @@ blessings == 1.6
 mach == 0.6.0
 mozdebug == 0.1
 mozinfo == 0.8
-mozlog == 3.3
+mozlog == 3.5
 setuptools == 18.5
 toml == 0.9.2