diff --git a/gradle.properties b/gradle.properties
index 2d46923..aeb1fc0 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -7,25 +7,25 @@ org.gradle.warning.mode = all
 
 # Kotlin - https://kotlinlang.org/docs/releases.html#release-details
 kotlin.code.style = official
-systemProp.kotlin_version = 1.8.22
+systemProp.kotlin_version = 1.9.10
 
 # Fabric - https://fabricmc.net/develop/
-minecraft_version = 1.20.1
-yarn_mappings = 1.20.1+build.10
+minecraft_version = 1.20.2
+yarn_mappings = 1.20.2+build.2
 loader_version = 0.14.22
-fabric_version = 0.86.1+1.20.1
-loom_version = 1.3-SNAPSHOT
+fabric_version = 0.89.2+1.20.2
+loom_version = 1.4-SNAPSHOT
 
 # Kotlin support for Fabric - https://github.com/FabricMC/fabric-language-kotlin
-fabric_language_kotlin_version = 1.9.6+kotlin.1.8.22
+fabric_language_kotlin_version = 1.10.10+kotlin.1.9.10
 
 # Kotlin JSON Seralization - https://mvnrepository.com/artifact/org.jetbrains.kotlinx/kotlinx-serialization-json
-kotlinx_serialization_json_version = 1.5.1
+kotlinx_serialization_json_version = 1.6.0
 
 # My callbacks - https://github.com/viral32111/events
 events_version = 0.4.3
 
 # Mod properties
-mod_version = 1.0.2
+mod_version = 1.0.3
 maven_group = com.viral32111
 archives_base_name = progression
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 17a8ddc..c30b486 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.2.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/src/main/kotlin/com/viral32111/progression/ProgressionState.kt b/src/main/kotlin/com/viral32111/progression/ProgressionState.kt
index afd4462..b6daf6b 100644
--- a/src/main/kotlin/com/viral32111/progression/ProgressionState.kt
+++ b/src/main/kotlin/com/viral32111/progression/ProgressionState.kt
@@ -8,7 +8,7 @@ import net.minecraft.nbt.NbtList
 import net.minecraft.nbt.NbtString
 import net.minecraft.server.MinecraftServer
 import net.minecraft.world.PersistentState
-import java.util.UUID
+import java.util.*
 
 // https://www.fabricmc.net/wiki/tutorial:persistent_states
 
@@ -17,9 +17,11 @@ class ProgressionState : PersistentState() {
 		private const val KEY_EXPERIENCE_COUNTER = "experienceCounter"
 		private const val KEY_PLAYERS_HIDING_BOSS_BAR = "playersHidingProgressBar"
 
+		private val myType: Type<ProgressionState> = Type<ProgressionState>({ ProgressionState() }, ProgressionState::createFromNbt, null )
+
 		fun getProgressionState( server: MinecraftServer ): ProgressionState? {
 			val persistentStateManager = server.overworld?.persistentStateManager
-			return persistentStateManager?.getOrCreate( ::createFromNbt, { ProgressionState() }, MOD_ID )
+			return persistentStateManager?.getOrCreate( myType, MOD_ID )
 		}
 
 		private fun createFromNbt( nbt: NbtCompound ): ProgressionState {