diff --git a/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java
index f82763155..16b767df5 100755
--- a/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java
@@ -223,7 +223,7 @@ public class RandomUtil {
 			min++;
 		}
 		if (includeMax) {
-			max--;
+			max++;
 		}
 		return getRandom().nextInt(min, max);
 	}
@@ -296,7 +296,7 @@ public class RandomUtil {
 			min++;
 		}
 		if (includeMax) {
-			max--;
+			max++;
 		}
 		return getRandom().nextLong(min, max);
 	}