diff --git a/_Dockerfile b/_Dockerfile
index 0694c3b6..acda8258 100644
--- a/_Dockerfile
+++ b/_Dockerfile
@@ -1,4 +1,4 @@
-FROM mongo:4.0.12
+FROM mongo:4.4.28
 
 ENV MONGO_INITDB_ROOT_USERNAME admin-user
 ENV MONGO_INITDB_ROOT_PASSWORD admin-password