diff --git a/requirements.txt b/requirements.txt
index 35f4366..ea047b1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,6 +13,6 @@ itsdangerous==0.24
 mongoengine==0.8.7
 pyasn1==0.1.7
 pycparser==2.10
-pymongo==2.8
+pymongo==4.6.3
 six==1.9.0
 wsgiref==0.1.2