diff --git a/root/etc/s6-overlay/s6-rc.d/svc-hedgedoc/run b/root/etc/s6-overlay/s6-rc.d/svc-hedgedoc/run
index e7e8433..e37399e 100755
--- a/root/etc/s6-overlay/s6-rc.d/svc-hedgedoc/run
+++ b/root/etc/s6-overlay/s6-rc.d/svc-hedgedoc/run
@@ -3,7 +3,7 @@
 
 # if user is using our env variables set the DB_URL
 if [[ -n ${DB_HOST+x} ]]; then
-    export CMD_DB_URL="mysql://${DB_USER}:${DB_PASS}@${DB_HOST}:${DB_PORT}/${DB_NAME}"
+    export CMD_DB_URL="${CMD_DB_DIALECT:-mysql}://${DB_USER}:${DB_PASS}@${DB_HOST}:${DB_PORT}/${DB_NAME}"
 fi
 
 # set env var for sqlite if db url and db_host unset