diff --git a/common/constants.go b/common/constants.go
index aefe72f..914c558 100644
--- a/common/constants.go
+++ b/common/constants.go
@@ -144,11 +144,11 @@ var (
 // All duration's unit is seconds
 // Shouldn't larger then RateLimitKeyExpirationDuration
 var (
-	GlobalApiRateLimitNum            = GetEnvOrDefault("GLOBAL_API_RATE_LIMIT", 180)
-	GlobalApiRateLimitDuration int64 = 3 * 60
+	GlobalApiRateLimitNum      = GetEnvOrDefault("GLOBAL_API_RATE_LIMIT", 180)
+	GlobalApiRateLimitDuration = int64(GetEnvOrDefault("GLOBAL_API_RATE_LIMIT_DURATION", 180))
 
-	GlobalWebRateLimitNum            = GetEnvOrDefault("GLOBAL_WEB_RATE_LIMIT", 60)
-	GlobalWebRateLimitDuration int64 = 3 * 60
+	GlobalWebRateLimitNum      = GetEnvOrDefault("GLOBAL_WEB_RATE_LIMIT", 60)
+	GlobalWebRateLimitDuration = int64(GetEnvOrDefault("GLOBAL_WEB_RATE_LIMIT_DURATION", 180))
 
 	UploadRateLimitNum            = 10
 	UploadRateLimitDuration int64 = 60