diff --git a/requirements.txt b/requirements.txt
index aef91ff..c4017d6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ itsdangerous==0.24
 Jinja2==2.8
 MarkupSafe==0.23
 mf2py==1.0.2
-mf2util==0.3.2
+mf2util==0.3.3
 psycopg2==2.6.1
 pyasn1==0.1.9
 pycparser==2.14