diff --git a/Makefile b/Makefile
index 0bdb8b14b..b8c316cca 100644
--- a/Makefile
+++ b/Makefile
@@ -51,7 +51,7 @@ deps: ## Download dependencies
 
 $(GO_BIN)/mockgen:
 	${call print, "Installing mockgen"}
-	@go install -v github.com/golang/mock/mockgen@v1.4.4
+	@go install -v github.com/golang/mock/mockgen@latest
 
 $(GO_BIN)/golangci-lint:
 	${call print, "Installing golangci-lint"}
diff --git a/tools.go b/tools/tools.go
similarity index 53%
rename from tools.go
rename to tools/tools.go
index 7a518f519..9295fa79b 100644
--- a/tools.go
+++ b/tools/tools.go
@@ -1,7 +1,9 @@
+//go:build tools
 // +build tools
 
-package main
+package tools
 
 import (
+	// Generator for mocks.
 	_ "github.com/golang/mock/mockgen"
 )