diff --git a/Makefile b/Makefile
index 91cf1d9..99530ce 100644
--- a/Makefile
+++ b/Makefile
@@ -45,7 +45,7 @@ test: build
 .PHONY: lint
 lint: $(GOBIN)/staticcheck
 	go vet ./...
-	staticcheck ./...
+	staticcheck -checks all ./...
 
 $(GOBIN)/staticcheck:
 	go install honnef.co/go/tools/cmd/staticcheck@latest
diff --git a/mmv.go b/mmv.go
index 4b6fae9..0a9856c 100644
--- a/mmv.go
+++ b/mmv.go
@@ -1,3 +1,4 @@
+// Package mmv provides a method to rename multiple files.
 package mmv
 
 import (