diff --git a/src/main/resources/swagger/api-docs.yaml b/src/main/resources/swagger/api-docs.yaml
index f3c0b2d0f..50688d53e 100755
--- a/src/main/resources/swagger/api-docs.yaml
+++ b/src/main/resources/swagger/api-docs.yaml
@@ -8553,6 +8553,9 @@ components:
           type: boolean
           description: Whether or not to delete intermediate output files when the
             workflow completes. See Cromwell docs for more information.
+        useReferenceDisks:
+          type: boolean
+          description: Whether or not to use pre-built disks for common genome references
         workflowFailureMode:
           type: string
           description: What happens after a task fails. Choose from ContinueWhilePossible
diff --git a/src/main/scala/org/broadinstitute/dsde/firecloud/model/ModelJsonProtocol.scala b/src/main/scala/org/broadinstitute/dsde/firecloud/model/ModelJsonProtocol.scala
index 739aac337..0dcb3b478 100644
--- a/src/main/scala/org/broadinstitute/dsde/firecloud/model/ModelJsonProtocol.scala
+++ b/src/main/scala/org/broadinstitute/dsde/firecloud/model/ModelJsonProtocol.scala
@@ -201,7 +201,7 @@ object ModelJsonProtocol extends WorkspaceJsonSupport with SprayJsonSupport {
 
   implicit val impEntityMetadata = jsonFormat3(EntityMetadata)
   implicit val impModelSchema = jsonFormat1(EntityModel)
-  implicit val impSubmissionRequest = jsonFormat8(SubmissionRequest)
+  implicit val impSubmissionRequest = jsonFormat9(SubmissionRequest)
 
   implicit val impEntityUpdateDefinition = jsonFormat3(EntityUpdateDefinition)
 
diff --git a/src/main/scala/org/broadinstitute/dsde/firecloud/model/Workspace.scala b/src/main/scala/org/broadinstitute/dsde/firecloud/model/Workspace.scala
index 70fce1e09..55275c4a3 100644
--- a/src/main/scala/org/broadinstitute/dsde/firecloud/model/Workspace.scala
+++ b/src/main/scala/org/broadinstitute/dsde/firecloud/model/Workspace.scala
@@ -91,6 +91,7 @@ case class SubmissionRequest(
   expression: Option[String],
   useCallCache: Option[Boolean],
   deleteIntermediateOutputFiles: Option[Boolean],
+  useReferenceDisks: Option[Boolean],
   workflowFailureMode: Option[String])
 
 case class RawlsGroupMemberList(
diff --git a/src/test/scala/org/broadinstitute/dsde/firecloud/mock/MockWorkspaceServer.scala b/src/test/scala/org/broadinstitute/dsde/firecloud/mock/MockWorkspaceServer.scala
index 99374ef49..a77fccb57 100644
--- a/src/test/scala/org/broadinstitute/dsde/firecloud/mock/MockWorkspaceServer.scala
+++ b/src/test/scala/org/broadinstitute/dsde/firecloud/mock/MockWorkspaceServer.scala
@@ -62,9 +62,10 @@ object MockWorkspaceServer {
     expression = Option(randomAlpha()),
     useCallCache = Option(randomBoolean()),
     deleteIntermediateOutputFiles = Option(randomBoolean()),
+    useReferenceDisks = Option(randomBoolean()),
     workflowFailureMode = Option(randomElement(List("ContinueWhilePossible", "NoNewCalls")))
-  ) 
-  
+  )
+
   val mockInvalidSubmission = SubmissionRequest(
     methodConfigurationNamespace = Option.empty,
     methodConfigurationName = Option.empty,