diff --git a/salt/manager/soc_manager.yaml b/salt/manager/soc_manager.yaml
index f3346269e..076725691 100644
--- a/salt/manager/soc_manager.yaml
+++ b/salt/manager/soc_manager.yaml
@@ -29,6 +29,7 @@ manager:
     global: True
     advanced: True
     multiline: True
+    forcedType: string
     helpLink: proxy.html
   insecureSkipVerify:
     description: Disable TLS verification for outgoing requests. This will make your installation less secure to MITM attacks. Recommended only for debugging purposes.