diff --git a/requirements/base.txt b/requirements/base.txt
index 7697c4e..ba58068 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -5,7 +5,7 @@ argon2-cffi==18.3.0  # https://github.com/hynek/argon2_cffi
 whitenoise==4.1  # https://github.com/evansd/whitenoise
 redis>=2.10.5  # https://github.com/antirez/redis
 pypandoc==1.4  # https://github.com/bebraw/pypandoc
-Pyzotero==1.3.6  # https://github.com/urschrei/pyzotero
+Pyzotero==1.4.6  # https://github.com/urschrei/pyzotero
 paypalrestsdk==1.13.1  # https://github.com/paypal/PayPal-Python-SDK
 bcrypt==3.1.4
 scp==0.12.1