diff --git a/src/main/java/com/example/tankbattle/Bullet.java b/src/main/java/com/example/tankbattle/Bullet.java
index 778273d..7d155c5 100644
--- a/src/main/java/com/example/tankbattle/Bullet.java
+++ b/src/main/java/com/example/tankbattle/Bullet.java
@@ -5,7 +5,8 @@ import java.awt.Graphics;
 
 public class Bullet {
     private static final int SPEED = 1;
-    private static final int WIDTH = 30, HEIGHT = 30;
+    public static final int WIDTH = ResourceMgr.bulletD.getWidth();
+    public static final int HEIGHT = ResourceMgr.bulletD.getHeight();
     private int x, y;
     private Dir dir;
 
@@ -38,7 +39,7 @@ public class Bullet {
             default:
                 break;
         }
-        
+
         move();
     }
 
diff --git a/src/main/java/com/example/tankbattle/Tank.java b/src/main/java/com/example/tankbattle/Tank.java
index 0038863..f1927d2 100644
--- a/src/main/java/com/example/tankbattle/Tank.java
+++ b/src/main/java/com/example/tankbattle/Tank.java
@@ -8,6 +8,9 @@ public class Tank {
     private Dir dir = Dir.DOWN;
     private static final int SPEED = 5;
 
+    private static final int WIDTH = ResourceMgr.tankD.getWidth();
+    private static final int HEIGHT = ResourceMgr.tankD.getHeight();
+
     private boolean moving = false;
 
     private TankFrame tf = null;
@@ -79,6 +82,8 @@ public class Tank {
     }
 
     public void fire(){
-        tf.bullets.add(new Bullet(this.x, this.y, this.dir, this.tf));
+        int bX = this.x + Tank.WIDTH >> 1 - Bullet.WIDTH >> 1;
+        int bY = this.y + Tank.HEIGHT >> 1 - Bullet.HEIGHT >> 1;
+        tf.bullets.add(new Bullet(bX, bY, this.dir, this.tf));
     }
 }