diff --git a/requirements.txt b/requirements.txt
index 6dedcdf..2c3026b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ isodate==0.5.4
 lazy==1.2
 lxml==4.2.1
 pylru==1.0.9
-pymongo==3.3.0
+pymongo==4.6.3
 unicodecsv==0.14.1
 pandas
 epitator