Preparing 0.20.0
diff --git a/tutorial/swift/Makefile.am b/tutorial/swift/Makefile.am
index f484560..e8b8b22 100644
--- a/tutorial/swift/Makefile.am
+++ b/tutorial/swift/Makefile.am
@@ -31,3 +31,13 @@
 
 tutorialclient: gen_swift
 	swift run TutorialClient
+
+EXTRA_DIST = \
+	Package.swift \
+	swift-dep \
+	Sources/TutorialClient/main.swift \
+	Sources/TutorialRunner/main.swift \
+	Sources/TutorialServer/main.swift \
+	Sources/TutorialServer/CalculatorService.swift \
+	README.md
+