diff --git a/builder.go b/builder.go
index 9be4161..a9e4b78 100644
--- a/builder.go
+++ b/builder.go
@@ -107,7 +107,7 @@ func (b Builder) Build(ctx context.Context, outputFile string) error {
 	log.Println("[INFO] Building Caddy")
 
 	// tidy the module to ensure go.mod and go.sum are consistent with the module prereq
-	tidyCmd := buildEnv.newGoModCommand(ctx, "tidy")
+	tidyCmd := buildEnv.newGoModCommand(ctx, "tidy", "-e")
 	if err := buildEnv.runCommand(ctx, tidyCmd); err != nil {
 		return err
 	}