diff --git a/build.gradle b/build.gradle
index 229b873..c822be5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,7 +3,16 @@ plugins {
     id 'eclipse'
     id 'idea'
     id 'maven-publish'
-    id 'net.neoforged.gradle.userdev' version '7.0.80'
+    id 'net.neoforged.gradle.userdev' version '7.0.145'
+}
+
+tasks.named('wrapper', Wrapper).configure {
+    // Define wrapper values here so as to not have to always do so when updating gradlew.properties.
+    // Switching this to Wrapper.DistributionType.ALL will download the full gradle sources that comes with
+    // documentation attached on cursor hover of gradle classes and methods. However, this comes with increased
+    // file size for Gradle. If you do switch this to ALL, run the Gradle wrapper task twice afterwards.
+    // (Verify by checking gradle/wrapper/gradle-wrapper.properties to see if distributionUrl now points to `-all`)
+    distributionType = Wrapper.DistributionType.BIN
 }
 
 // Enable the Jar-in-Jar system for your mod
@@ -27,8 +36,8 @@ base {
     archivesName = mod_name
 }
 
-// Mojang ships Java 17 to end users in 1.18+, so your mod should target Java 17.
-java.toolchain.languageVersion = JavaLanguageVersion.of(17)
+// Mojang ships Java 21 to end users starting in 1.20.5, so mods should target Java 21.
+java.toolchain.languageVersion = JavaLanguageVersion.of(21)
 
 println "Java: ${System.getProperty 'java.version'}, JVM: ${System.getProperty 'java.vm.version'} (${System.getProperty 'java.vendor'}), Arch: ${System.getProperty 'os.arch'}"
 runs {
@@ -154,3 +163,11 @@ publishing {
 tasks.withType(JavaCompile).configureEach {
     options.encoding = 'UTF-8' // Use the UTF-8 charset for Java compilation
 }
+
+// IDEA no longer automatically downloads sources/javadoc jars for dependencies, so we need to explicitly enable the behavior.
+idea {
+    module {
+        downloadSources = true
+        downloadJavadoc = true
+    }
+}
diff --git a/gradle.properties b/gradle.properties
index e26d7c4..cef5677 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,21 +2,21 @@ org.gradle.debug=false
 
 #read more on this at https://github.com/neoforged/NeoGradle/blob/NG_7.0/README.md#apply-parchment-mappings
 # you can also find the latest versions at: https://parchmentmc.org/docs/getting-started
-neogradle.subsystems.parchment.minecraftVersion=1.20.3
-neogradle.subsystems.parchment.mappingsVersion=2023.12.31
+neogradle.subsystems.parchment.minecraftVersion=1.21
+neogradle.subsystems.parchment.mappingsVersion=2024.07.28
 # Environment Properties
 # You can find the latest versions here: https://projects.neoforged.net/neoforged/neoforge
 # The Minecraft version must agree with the Neo version to get a valid artifact
-minecraft_version=1.20.4
-minecraft_version_range=[1.20.4,1.21)
+minecraft_version=1.21.1
+minecraft_version_range=[1.21.1,1.22)
 # The Neo version must agree with the Minecraft version to get a valid artifact
-neo_version=20.4.195
+neo_version=21.1.51
 # The Neo version range can use any version of Neo as bounds
-neo_version_range=[20.4,)
+neo_version_range=[21.1,)
 # The loader version range can only use the major version of FML as bounds
-loader_version_range=[2,)
+loader_version_range=[4,)
 
-jei_version=17.3.0.49
+jei_version=19.18.3.204
 jgt_version=1.5.2
 jheaps_version=0.14
 apfloat_version=1.10.1
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 37aef8d..09523c0 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
 networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists