diff --git a/applications/sink/mongodb-sink/pom.xml b/applications/sink/mongodb-sink/pom.xml
index c74a071c..fd353acb 100644
--- a/applications/sink/mongodb-sink/pom.xml
+++ b/applications/sink/mongodb-sink/pom.xml
@@ -53,14 +53,17 @@
                         <version>${project.version}</version>
                         <configClass>org.springframework.cloud.fn.consumer.mongo.MongoDbConsumerConfiguration.class
                         </configClass>
-                        <functionDefinition>mongodbConsumer</functionDefinition>
-
+                        <functionDefinition>byteArrayTextToString|mongodbConsumer</functionDefinition>
                         <maven>
                             <dependencies>
                                 <dependency>
                                     <groupId>org.springframework.cloud.fn</groupId>
                                     <artifactId>mongodb-consumer</artifactId>
                                 </dependency>
+                                <dependency>
+                                    <groupId>org.springframework.cloud.fn</groupId>
+                                    <artifactId>payload-converter-function</artifactId>
+                                </dependency>
                             </dependencies>
                         </maven>
                     </application>
diff --git a/applications/source/sftp-source/README.adoc b/applications/source/sftp-source/README.adoc
index 9ec82749..f2f963c4 100644
--- a/applications/source/sftp-source/README.adoc
+++ b/applications/source/sftp-source/README.adoc
@@ -144,6 +144,7 @@ $$max-fetch$$:: $$The maximum number of remote files to fetch per poll; default
 $$preserve-timestamp$$:: $$Set to true to preserve the original timestamp.$$ *($$Boolean$$, default: `$$true$$`)*
 $$remote-dir$$:: $$The remote FTP directory.$$ *($$String$$, default: `$$/$$`)*
 $$remote-file-separator$$:: $$The remote file separator.$$ *($$String$$, default: `$$/$$`)*
+$$rename-remote-files-to$$:: $$A SpEL expression resolving to the new name remote files must be renamed to after successful transfer.$$ *($$Expression$$, default: `$$<none>$$`)*
 $$stream$$:: $$Set to true to stream the file rather than copy to a local directory.$$ *($$Boolean$$, default: `$$false$$`)*
 $$tmp-file-suffix$$:: $$The suffix to use while the transfer is in progress.$$ *($$String$$, default: `$$.tmp$$`)*