diff --git a/Makefile b/Makefile
index 81277c89d..2e1cf3967 100644
--- a/Makefile
+++ b/Makefile
@@ -122,7 +122,9 @@ validate:
 	script/validate-c
 	$(GO) vet $(MOD_VENDOR) ./...
 	shellcheck tests/integration/*.bats
+	# TODO: add shellcheck for sh files
 	shfmt -ln bats -d tests/integration/*.bats
+	shfmt -ln bash -d man/*.sh script/*.sh tests/*.sh tests/integration/*.bash
 
 ci: validate test release