diff --git a/core/src/main/java/net/momirealms/craftengine/core/pack/model/SelectItemModel.java b/core/src/main/java/net/momirealms/craftengine/core/pack/model/SelectItemModel.java
index ac9596f0b..8f449f423 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/pack/model/SelectItemModel.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/pack/model/SelectItemModel.java
@@ -167,11 +167,11 @@ public class SelectItemModel implements ItemModel {
                     if (whenObj instanceof JsonArray array) {
                         List<String> whens = new ArrayList<>(array.size());
                         for (JsonElement o : array) {
-                            whens.add(o.toString());
+                            whens.add(o.getAsString());
                         }
                         either = Either.ofFallback(whens);
                     } else if (whenObj instanceof JsonPrimitive primitive) {
-                        either = Either.ofPrimary(primitive.toString());
+                        either = Either.ofPrimary(primitive.getAsString());
                     } else {
                         throw new IllegalArgumentException("when is expected to be either JsonPrimitive or JsonArray");
                     }
diff --git a/core/src/main/java/net/momirealms/craftengine/core/pack/model/condition/SimpleConditionProperty.java b/core/src/main/java/net/momirealms/craftengine/core/pack/model/condition/SimpleConditionProperty.java
index 879df1828..61ff846fd 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/pack/model/condition/SimpleConditionProperty.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/pack/model/condition/SimpleConditionProperty.java
@@ -35,7 +35,7 @@ public class SimpleConditionProperty implements ConditionProperty {
     public static class Reader implements ConditionPropertyReader {
         @Override
         public ConditionProperty read(JsonObject json) {
-            return new SimpleConditionProperty(Key.of(json.get("property").toString()));
+            return new SimpleConditionProperty(Key.of(json.get("property").getAsString()));
         }
     }
 }
diff --git a/core/src/main/java/net/momirealms/craftengine/core/pack/model/rangedisptach/SimpleRangeDispatchProperty.java b/core/src/main/java/net/momirealms/craftengine/core/pack/model/rangedisptach/SimpleRangeDispatchProperty.java
index 9e30fb5a8..5c637e301 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/pack/model/rangedisptach/SimpleRangeDispatchProperty.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/pack/model/rangedisptach/SimpleRangeDispatchProperty.java
@@ -35,7 +35,7 @@ public class SimpleRangeDispatchProperty implements RangeDispatchProperty {
     public static class Reader implements RangeDispatchPropertyReader {
         @Override
         public RangeDispatchProperty read(JsonObject json) {
-            Key type = Key.of(json.get("property").toString());
+            Key type = Key.of(json.get("property").getAsString());
             return new SimpleRangeDispatchProperty(type);
         }
     }
diff --git a/core/src/main/java/net/momirealms/craftengine/core/pack/model/select/SimpleSelectProperty.java b/core/src/main/java/net/momirealms/craftengine/core/pack/model/select/SimpleSelectProperty.java
index dbb000fa4..c108fc94f 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/pack/model/select/SimpleSelectProperty.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/pack/model/select/SimpleSelectProperty.java
@@ -35,7 +35,7 @@ public class SimpleSelectProperty implements SelectProperty {
     public static class Reader implements SelectPropertyReader {
         @Override
         public SelectProperty read(JsonObject json) {
-            Key type = Key.of(json.get("property").toString());
+            Key type = Key.of(json.get("property").getAsString());
             return new SimpleSelectProperty(type);
         }
     }
diff --git a/core/src/main/java/net/momirealms/craftengine/core/pack/model/special/SimpleSpecialModel.java b/core/src/main/java/net/momirealms/craftengine/core/pack/model/special/SimpleSpecialModel.java
index 9b7fa9d43..facbc1d4b 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/pack/model/special/SimpleSpecialModel.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/pack/model/special/SimpleSpecialModel.java
@@ -45,7 +45,7 @@ public class SimpleSpecialModel implements SpecialModel {
     public static class Reader implements SpecialModelReader {
         @Override
         public SpecialModel read(JsonObject json) {
-            Key type = Key.of(json.get("type").toString());
+            Key type = Key.of(json.get("type").getAsString());
             return new SimpleSpecialModel(type);
         }
     }
diff --git a/gradle.properties b/gradle.properties
index a38540617..1757b198e 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -41,7 +41,7 @@ commons_io_version=2.18.0
 commons_imaging_version=1.0.0-alpha6
 commons_lang3_version=3.17.0
 sparrow_nbt_version=0.9.1
-sparrow_util_version=0.49.2
+sparrow_util_version=0.50
 fastutil_version=8.5.15
 netty_version=4.1.121.Final
 joml_version=1.10.8