diff --git a/.scalafmt.conf b/.scalafmt.conf
index 1cffef8..472cd55 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -10,6 +10,7 @@ align.openParenCallSite = false
 align.openParenDefnSite = false
 binPack.literalArgumentLists = true
 project.git = true
+trailingCommas = preserve
 
 # exclude submodules
 project.excludeFilters = [