diff --git a/prometheus-operator/snmp.yml b/prometheus-operator/snmp.yml
index cf97e41..605e1b4 100644
--- a/prometheus-operator/snmp.yml
+++ b/prometheus-operator/snmp.yml
@@ -33,6 +33,7 @@ epson_beamer:
       type: gauge
 
 printer_mib:
+  version: 1
   walk:
   - 1.3.6.1.2.1.25.3.5.1.1
   - 1.3.6.1.2.1.43.11.1.1.5