diff --git a/server/gameserver/mt/PveGemini.cc b/server/gameserver/mt/PveGemini.cc
index c6612d22..0bc98f16 100644
--- a/server/gameserver/mt/PveGemini.cc
+++ b/server/gameserver/mt/PveGemini.cc
@@ -21,7 +21,7 @@ namespace mt
 
     float PveGemini::GetHpMul(int num) const
     {
-        if (num > 0 && num <= hp_muls.size()) {
+        if (num > 0 && num <= (int)hp_muls.size()) {
             return hp_muls[num - 1];
         }
 #ifdef DEBUG
diff --git a/server/gameserver/mt/PveGeminiMode.cc b/server/gameserver/mt/PveGeminiMode.cc
index ed3fe671..14b79285 100644
--- a/server/gameserver/mt/PveGeminiMode.cc
+++ b/server/gameserver/mt/PveGeminiMode.cc
@@ -42,11 +42,11 @@ namespace mt
         _waves.resize(_mode_time.size());
         for (auto& content : *mt::PveGeminiContent::GetContentsByMode(id())) {
             if (content->round() <= 0 ||
-                content->round() > _mode_time.size()) {
+                content->round() > (int)_mode_time.size()) {
                 abort();
             }
             _waves[content->round() - 1].push_back(content);
-            if (content->round() >= _waves.size()) {
+            if (content->round() >= (int)_waves.size()) {
                 if (content->_enemys.size() != 1) {
                     abort();
                 }
@@ -103,7 +103,7 @@ namespace mt
     int PveGeminiMode::CalcStar(int score) const
     {
         int star = 0;
-        for (int i = 0; i < _score_reward.size(); ++i) {
+        for (size_t i = 0; i < _score_reward.size(); ++i) {
             if (score >= _score_reward[i]) {
                 star = i + 1;
             } else {