diff --git a/src/com/hellogithub/service/projectService.java b/src/com/hellogithub/service/projectService.java
index 3e10bd7..d8d5d8d 100644
--- a/src/com/hellogithub/service/projectService.java
+++ b/src/com/hellogithub/service/projectService.java
@@ -153,7 +153,7 @@ public class projectService {
 
         if(commentEntityList.size() != 0)
         {
-            int sum = 0;
+            double sum = 0;
             for(int i= 0;i<commentEntityList.size();i++)
             {
                 sum +=commentEntityList.get(i).getStar();