diff --git a/php/containers.json b/php/containers.json
index d75d59c9..5c3e02fd 100644
--- a/php/containers.json
+++ b/php/containers.json
@@ -203,7 +203,7 @@
       "internal_port": "9980",
       "environment": [
         "aliasgroup1=https://%NC_DOMAIN%:443",
-        "extra_params=--o:ssl.enable=false --o:ssl.termination=true --o:logging.level=warning --o:home_mode.enable=true %COLLABORA_SECCOMP_POLICY% --o:remote_font_config.url=https://%NC_DOMAIN%/apps/richdocuments/settings/fonts.json",
+        "extra_params=--o:ssl.enable=false --o:ssl.termination=true --o:mount_jail_tree=false --o:logging.level=warning --o:home_mode.enable=true %COLLABORA_SECCOMP_POLICY% --o:remote_font_config.url=https://%NC_DOMAIN%/apps/richdocuments/settings/fonts.json",
         "dictionaries=%COLLABORA_DICTIONARIES%",
         "TZ=%TIMEZONE%",
         "server_name=%NC_DOMAIN%"