diff --git a/applications/processor/filter-processor/README.adoc b/applications/processor/filter-processor/README.adoc
index a876d9c7..db61e062 100644
--- a/applications/processor/filter-processor/README.adoc
+++ b/applications/processor/filter-processor/README.adoc
@@ -16,6 +16,7 @@ If the incoming type is `byte[]` and the content type is set to `text/plain` or
 == Options
 
 //tag::configuration-properties[]
+$$filter.function.expression$$:: $$A SpEL expression to apply.$$ *($$String$$, default: `$$<none>$$`)*
 //end::configuration-properties[]
 
 //end::ref-doc[]
diff --git a/functions/function/filter-function/pom.xml b/functions/function/filter-function/pom.xml
index aa94ef67..901a61af 100644
--- a/functions/function/filter-function/pom.xml
+++ b/functions/function/filter-function/pom.xml
@@ -24,6 +24,11 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-integration</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-configuration-processor</artifactId>
+            <scope>provided</scope>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>