diff --git a/requirements/base.in b/requirements/base.in
index 88fa135..d0112f2 100644
--- a/requirements/base.in
+++ b/requirements/base.in
@@ -1,7 +1,5 @@
 # Core requirements for using this application
 -c constraints.txt
 
-# migration guide here: https://pymongo.readthedocs.io/en/4.0/migrate-to-pymongo4.html
-pymongo>=2.7.2,<4.0
 stevedore>=0.14.1
 typing-extensions