diff --git a/env/env.go b/env/env.go
index 88410a4..1b4753f 100644
--- a/env/env.go
+++ b/env/env.go
@@ -54,7 +54,7 @@ func CamelCaseToLowerSnakeCase(s string) string {
 		return ""
 	}
 	words := SplitByCase(s)
-	// ToUpper + Join by _
+	// ToLower + Join by _
 	return strings.ToLower(strings.Join(words, "_"))
 }