diff --git a/rtoot.Rproj b/rtoot.Rproj
index 69fafd4..fd8dd28 100644
--- a/rtoot.Rproj
+++ b/rtoot.Rproj
@@ -6,7 +6,7 @@ AlwaysSaveHistory: Default
 
 EnableCodeIndexing: Yes
 UseSpacesForTab: Yes
-NumSpacesForTab: 2
+NumSpacesForTab: 4
 Encoding: UTF-8
 
 RnwWeave: Sweave