diff --git a/install.yaml b/install.yaml
index a430730..ab136a2 100644
--- a/install.yaml
+++ b/install.yaml
@@ -18,4 +18,4 @@ post_install_actions:
   - |
     #ddev-description: Change the redis dump filename
     #
-    sed -i "s/REPLACE_ME/${DDEV_SITENAME}/g" redis/snapshots.conf
+    sed -i -e "s/REPLACE_ME/${DDEV_SITENAME}/g" redis/snapshots.conf