diff --git a/extras.Rproj b/extras.Rproj
index 88ff2b5..9e36e1d 100644
--- a/extras.Rproj
+++ b/extras.Rproj
@@ -1,4 +1,5 @@
 Version: 1.0
+ProjectId: 8629deed-40ee-4c36-9796-bc4f821454de
 
 RestoreWorkspace: Default
 SaveWorkspace: Default