diff --git a/requirements.txt b/requirements.txt
index ccadcd238..c4eafdbcc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ iso8601==0.1.12
 jsonschema==2.6.0
 marshmallow-sqlalchemy==0.13.2
 marshmallow==2.15.1
-monotonic==1.4
+monotonic==1.5
 psycopg2-binary==2.7.4
 PyJWT==1.6.1
 SQLAlchemy==1.2.6