diff --git a/stats/stats_http.go b/stats/stats_http.go
index e857ecc3..a507b32c 100644
--- a/stats/stats_http.go
+++ b/stats/stats_http.go
@@ -41,6 +41,7 @@ func (s *statsCtx) handleStats(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	w.Header().Set("Content-Type", "application/json")
 	w.Write(data)
 }