diff --git a/requirements.txt b/requirements.txt
index a701149..313426a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,4 +9,4 @@ pydocstyle==5.0.1
 flake8==3.7.9
 pylint==2.4.4
 openbabel>=3.0
-pymongo==3.9.0
\ No newline at end of file
+pymongo==4.6.3
\ No newline at end of file