diff --git a/requirements.txt b/requirements.txt
index 2024cf92..29a44425 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ parsedatetime==1.5
 Pillow==2.9.0
 pycparser==2.10
 py-dateutil==2.2
-pyflakes==1.5.0
+pyflakes==3.3.1
 pygments==2.1
 pylab
 pyparsing==2.0.1