diff --git a/core/src/main/java/net/momirealms/craftengine/core/util/SNBTReader.java b/core/src/main/java/net/momirealms/craftengine/core/util/SNBTReader.java
index 5d609538f..822e01203 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/util/SNBTReader.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/util/SNBTReader.java
@@ -93,8 +93,7 @@ public final class SNBTReader extends DefaultStringReader {
         // 检查接下来的2个非空格字符, 确认是否要走数组解析.
         if (canRead()) {
             setMarker(cursor); // 记录指针, 尝试解析数组.
-            char typeChar = peek();
-            if (typeChar < 'a') typeChar = (char) (typeChar + 32); // 强制转小写进行匹配.
+            char typeChar = Character.toLowerCase(peek());
             if (typeChar == BYTE_ARRAY || typeChar == INT_ARRAY || typeChar == LONG_ARRAY) {
                 skip();
                 skipWhitespace();
@@ -253,7 +252,7 @@ public final class SNBTReader extends DefaultStringReader {
         if (tokenLength > 1) {
             // 至少有1个字符，给了后缀的可能性
             char lastChar = charAt(tokenStart + tokenLength - 1);
-            if (lastChar < 'a') lastChar = (char) (lastChar + 32); // 强制转小写进行匹配.
+            lastChar = Character.toLowerCase(lastChar); // 强制转小写进行匹配.
             try {
                 switch (lastChar) {
                     case BYTE_SUFFIX -> {