diff --git a/.gitignore b/.gitignore
index a1b3c69..3b90ccd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /node_modules
 .DS_Store
+xcuserdata
 
diff --git a/SequenceDiagram.xcworkspace/contents.xcworkspacedata b/SequenceDiagram.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..4b202bb
--- /dev/null
+++ b/SequenceDiagram.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "container:scripts">
+   </FileRef>
+   <FileRef
+      location = "container:styles">
+   </FileRef>
+   <FileRef
+      location = "container:editor-dev.htm">
+   </FileRef>
+   <FileRef
+      location = "container:index.html">
+   </FileRef>
+   <FileRef
+      location = "container:library.htm">
+   </FileRef>
+   <FileRef
+      location = "container:LICENSE">
+   </FileRef>
+   <FileRef
+      location = "container:package.json">
+   </FileRef>
+   <FileRef
+      location = "container:readme_images.htm">
+   </FileRef>
+   <FileRef
+      location = "container:README.md">
+   </FileRef>
+   <FileRef
+      location = "container:test.htm">
+   </FileRef>
+</Workspace>