diff --git a/task/ip.go b/task/ip.go
index 93ff47d..02d3359 100644
--- a/task/ip.go
+++ b/task/ip.go
@@ -27,6 +27,9 @@ func InitRandSeed() {
 }
 
 func randIPEndWith(num byte) byte {
+	if num == 0 { // 对于 /32 这种单独的 IP
+		return byte(0)
+	}
 	return byte(rand.Intn(int(num)))
 }
 
@@ -86,10 +89,6 @@ func (r *IPRanges) getIPRange() (minIP, hosts byte) {
 		hosts = 255
 		return
 	}
-	if total == 0 {
-		hosts = 1
-		return
-	}
 	hosts = byte(total)
 	return
 }