diff --git a/requirements.txt b/requirements.txt
index 0773d59..31b83ee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 somutils==1.7.2
-pymongo<3.0;python_version<="2.7.18"
+pymongo==3.13.0;python_version<="2.7.18"
 pymongo<4.0;python_version>"2.7.18"
 numpy<1.17;python_version<="2.7.18"
 numpy;python_version>"2.7.18"