diff --git a/config/ini.go b/config/ini.go
index 27220f90..8fdbc2ea 100644
--- a/config/ini.go
+++ b/config/ini.go
@@ -416,7 +416,7 @@ func (c *IniConfigContainer) Set(key, value string) error {
 
 	var (
 		section, k string
-		sectionKey = strings.Split(key, "::")
+		sectionKey = strings.Split(strings.ToLower(key), "::")
 	)
 
 	if len(sectionKey) >= 2 {