diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e6774b1759..d82ab8ec44 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,18 +4,18 @@ jobs:
   build:
     strategy:
       matrix:
-        java: [17-jdk, 20-jdk]
+        java: [17-jdk, 21-jdk]
     runs-on: ubuntu-22.04
     container:
       image: eclipse-temurin:${{ matrix.java }}
       options: --user root
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: ./gradlew build javadocJar checkMappings --stacktrace --warning-mode fail
       - name: Build artifacts
-        if: ${{ matrix.java == '20-jdk' }}
+        if: ${{ matrix.java == '21-jdk' }}
         continue-on-error: true
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Artifacts
           path: build/libs/
@@ -23,9 +23,9 @@ jobs:
   test-build-logic:
     runs-on: ubuntu-22.04
     container:
-      image: eclipse-temurin:20-jdk
+      image: eclipse-temurin:21-jdk
       options: --user root
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: gradle/wrapper-validation-action@v1
       - run: ./gradlew :filament:build
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 6c114d697f..d8a92393ec 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -6,10 +6,10 @@ jobs:
     if: ${{ github.repository_owner == 'FabricMC' }}
     runs-on: ubuntu-22.04
     container:
-      image: eclipse-temurin:20-jdk
+      image: eclipse-temurin:21-jdk
       options: --user root
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       # Generate the build number based on tags to allow per branch build numbers, not something github provides by default.
       - name: Generate build number
         id: buildnumber
diff --git a/.github/workflows/release-filament.yml b/.github/workflows/release-filament.yml
index 7396c3e780..3d60b327d6 100644
--- a/.github/workflows/release-filament.yml
+++ b/.github/workflows/release-filament.yml
@@ -4,10 +4,10 @@ jobs:
   build:
     runs-on: ubuntu-22.04
     container:
-      image: eclipse-temurin:20-jdk
+      image: eclipse-temurin:21-jdk
       options: --user root
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: ./gradlew :filament:build :filament:publish --stacktrace --no-configuration-cache
         env:
           MAVEN_URL: ${{ secrets.MAVEN_URL }}
diff --git a/build.gradle b/build.gradle
index 7fbabcaba7..d1522ecf8e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -109,6 +109,8 @@ import net.fabricmc.filament.task.mappingio.MergeMappingsTask
 import net.fabricmc.mappingio.format.MappingFormat
 import net.fabricmc.nameproposal.MappingNameCompleter
 import org.gradle.work.DisableCachingByDefault
+import com.diffplug.spotless.LineEnding
+import groovy.xml.XmlSlurper
 
 import java.util.zip.GZIPOutputStream
 
@@ -186,7 +188,7 @@ tasks.register('mapSpecializedMethods', MapSpecializedMethodsTask) {
 tasks.register('convertToV1', ConvertMappingsTask) {
 	input = mapSpecializedMethods.output
 	output = new File(tempDir, "yarn-mappings.tiny")
-	outputFormat = MappingFormat.TINY
+	outputFormat = MappingFormat.TINY_FILE
 }
 
 tasks.register('mergeTiny', MergeMappingsTask) {
@@ -194,7 +196,7 @@ tasks.register('mergeTiny', MergeMappingsTask) {
 	output = new File(tempDir, "mappings.tiny")
 	mappingInputs.from downloadIntermediary.output
 	mappingInputs.from convertToV1.output
-	outputFormat = MappingFormat.TINY
+	outputFormat = MappingFormat.TINY_FILE
 }
 
 // Disable the default jar task
@@ -281,7 +283,7 @@ tasks.withType(AbstractArchiveTask).configureEach {
 }
 
 spotless {
-	lineEndings = com.diffplug.spotless.LineEnding.UNIX
+	lineEndings = LineEnding.UNIX
 
 	java {
 		licenseHeaderFile(rootProject.file("HEADER"))
@@ -347,7 +349,7 @@ tasks.register('mergeV2', MergeMappingsTask) {
 	output = new File(tempDir, "merged-v2.tiny")
 	mappingInputs.from downloadIntermediary.output
 	mappingInputs.from insertAutoGeneratedEnumMappings.output
-	outputFormat = MappingFormat.TINY_2
+	outputFormat = MappingFormat.TINY_2_FILE
 }
 
 tasks.register('v2UnmergedYarnJar', Jar) {
@@ -510,8 +512,8 @@ javadoc {
 	source fileTree(fakeSourceDir) + sourceSets.constants.allJava + sourceSets.packageDocs.allJava
 	classpath = configurations.javadocClasspath.plus minecraftLibraries
 
-	def fs = services.get(FileSystemOperations.class)
-	def outputDir = javadoc.outputDirectory
+	def fs = project.services.get(FileSystemOperations.class)
+	def outputDir = javadoc.destinationDir
 
 	doLast {
 		fs.copy {
@@ -558,7 +560,7 @@ check.dependsOn javadocLint
 
 publishing {
 	publications {
-		maven(MavenPublication) {
+		register("maven", MavenPublication) {
 			groupId 'net.fabricmc'
 			artifactId "yarn"
 			version yarnVersion
diff --git a/filament/build.gradle b/filament/build.gradle
index 0b1840a463..022926129b 100644
--- a/filament/build.gradle
+++ b/filament/build.gradle
@@ -38,10 +38,10 @@ dependencies {
 	implementation "net.fabricmc:tiny-remapper:$properties.tiny_remapper_version"
 	implementation "net.fabricmc:mappingpoet:$properties.mappingpoet_version"
 	implementation 'com.fasterxml.jackson.core:jackson-databind:2.13.4.2'
-	implementation 'net.fabricmc:mapping-io:0.4.0'
+	implementation 'net.fabricmc:mapping-io:0.5.1'
 
 	// Contains a number of useful utilities we can re-use.
-	implementation ("net.fabricmc:fabric-loom:1.2.7") {
+	implementation ("net.fabricmc:fabric-loom:1.5.7") {
 		transitive = false
 	}
 
@@ -61,7 +61,7 @@ test {
 
 checkstyle {
 	configFile = file('checkstyle.xml')
-	toolVersion = '10.3.3'
+	toolVersion = '10.13.0'
 }
 
 gradlePlugin {
@@ -91,7 +91,7 @@ publishing {
 /**
  * Run this task to download the gradle sources next to the api jar, you may need to manually attach the sources jar
  */
-task downloadGradleSources() {
+tasks.register('downloadGradleSources') {
 	doLast {
 		// Awful hack to find the gradle api location
 		def gradleApiFile = project.configurations.detachedConfiguration(dependencies.gradleApi()).files.stream()
diff --git a/gradle.properties b/gradle.properties
index 7611bbf38e..358a35e596 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,15 +6,15 @@ org.gradle.configuration-cache=true
 enigma_version=2.3.3
 unpick_version=2.3.0
 cfr_version=0.2.1
-name_proposal_version=0.1.5
-asm_version=9.5
+name_proposal_version=0.2.0
+asm_version=9.6
 
 # Javadoc generation/linking
-fabric_loader_version=0.14.25
-jetbrains_annotations_version=23.0.0
+fabric_loader_version=0.15.6
+jetbrains_annotations_version=24.1.0
 mappingpoet_version=0.3.2
 
 # Build logic
-tiny_remapper_version=0.8.5
-junit_version=5.7.1
-assertj_version=3.19.0
+tiny_remapper_version=0.10.1
+junit_version=5.10.2
+assertj_version=3.25.3
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 7f93135c49..933486d825 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index ac72c34e8a..a80b22ce5c 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-8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/gradlew b/gradlew
index 0adc8e1a53..1aa94a4269 100755
--- a/gradlew
+++ b/gradlew
@@ -145,7 +145,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
         # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
@@ -153,7 +153,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
       '' | soft) :;; #(
       *)
         # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -202,11 +202,11 @@ fi
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
diff --git a/gradlew.bat b/gradlew.bat
index 93e3f59f13..25da30dbde 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -43,11 +43,11 @@ set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
 if %ERRORLEVEL% equ 0 goto execute
 
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -57,11 +57,11 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail