diff --git a/docs/src/main/asciidoc/_configprops.adoc b/docs/src/main/asciidoc/_configprops.adoc
index f6ecb4b..83b5e3c 100644
--- a/docs/src/main/asciidoc/_configprops.adoc
+++ b/docs/src/main/asciidoc/_configprops.adoc
@@ -1,14 +1,14 @@
 |===
 |Name | Default | Description
 
-|spring.cloud.bus.ack.destination-service |  | Service that wants to listen to acks. By default null (meaning all services).
-|spring.cloud.bus.ack.enabled | true | Flag to switch off acks (default on).
-|spring.cloud.bus.content-type |  | The bus mime-type.
-|spring.cloud.bus.destination |  | Name of Spring Cloud Stream destination for messages.
-|spring.cloud.bus.enabled | true | Flag to indicate that the bus is enabled.
-|spring.cloud.bus.env.enabled | true | Flag to switch off environment change events (default on).
-|spring.cloud.bus.id | application | The identifier for this application instance.
-|spring.cloud.bus.refresh.enabled | true | Flag to switch off refresh events (default on).
-|spring.cloud.bus.trace.enabled | false | Flag to switch on tracing of acks (default off).
+|spring.cloud.bus.ack.destination-service | `` | Service that wants to listen to acks. By default null (meaning all services).
+|spring.cloud.bus.ack.enabled | `true` | Flag to switch off acks (default on).
+|spring.cloud.bus.content-type | `` | The bus mime-type.
+|spring.cloud.bus.destination | `` | Name of Spring Cloud Stream destination for messages.
+|spring.cloud.bus.enabled | `true` | Flag to indicate that the bus is enabled.
+|spring.cloud.bus.env.enabled | `true` | Flag to switch off environment change events (default on).
+|spring.cloud.bus.id | `application` | The identifier for this application instance.
+|spring.cloud.bus.refresh.enabled | `true` | Flag to switch off refresh events (default on).
+|spring.cloud.bus.trace.enabled | `false` | Flag to switch on tracing of acks (default off).
 
 |===
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