diff --git a/db-backup/Dockerfile b/db-backup/Dockerfile
index 97d676f216ce90f913968009264168bcc2ac90d5..f3575784b4fa3a2c6fa915c1ba43efb2e0902792 100644
--- a/db-backup/Dockerfile
+++ b/db-backup/Dockerfile
@@ -1,4 +1,4 @@
-FROM registry.picasoft.net:5000/pica-debian
+FROM registry.picasoft.net:5000/pica-debian:stretch
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \