diff --git a/scripts/_common.sh b/scripts/_common.sh
index 83df98e..45c42eb 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -329,7 +329,14 @@ ynh_install_mongo() {
 	ynh_print_info --message="Installing MongoDB Community Edition ..."
 	local mongo_debian_release=$(ynh_get_debian_release)
 
-	if [ "$mongo_debian_release" == bullseye ] ; then
+    if [[ "$mongo_version" == "4.4" && "$mongo_debian_release" != "buster" ]]; then
+    ynh_print_warn --message="Switched to buster install as Mongo 4.4 is not compatible with $mongo_debian_release."
+    mongo_debian_release=buster
+  	fi
+
+	if [ "$mongo_debian_release" == buster ] ; then
+    ubuntu_version="bionic"
+	elif [ "$mongo_debian_release" == bullseye ] ; then
     ubuntu_version="focal"
 	elif [ "$mongo_debian_release" == bookworm ] ; then
 	ubuntu_version="jammy"
@@ -338,7 +345,9 @@ ynh_install_mongo() {
 	if [[ $(cat /proc/cpuinfo) != *"avx"* && "$mongo_version" != "4.4" ]]; then
     ynh_print_warn --message="Installing Mongo 4.4 as $mongo_version is not compatible with your cpu (see https://docs.mongodb.com/manual/administration/production-notes/#x86_64)."
     mongo_version="4.4"
-  fi
+  	fi
+
+
 
 	ynh_install_extra_app_dependencies \
 		--repo="deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu $ubuntu_version/mongodb-org/$mongo_version multiverse" \