diff --git a/spine-libgdx/build.gradle b/spine-libgdx/build.gradle
index bb7497880..4e6d10ecf 100644
--- a/spine-libgdx/build.gradle
+++ b/spine-libgdx/build.gradle
@@ -1,84 +1,84 @@
 ext {
-    libgdxVersion = "1.12.2-SNAPSHOT"
+	libgdxVersion = "1.12.2-SNAPSHOT"
 }
 
 allprojects {
-    apply plugin: "java"
+	apply plugin: "java"
 
-    sourceSets.main.java.srcDirs = ["src"]
+	sourceSets.main.java.srcDirs = ["src"]
 
-    repositories {
-        mavenLocal()
-        maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
-        mavenCentral()
-    }
+	repositories {
+		mavenLocal()
+		maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
+		mavenCentral()
+	}
 
-    tasks.withType(JavaCompile).configureEach {
-        sourceCompatibility = '1.7'
-        targetCompatibility = '1.7'
-        options.release.set(7)  // Ensures Java 8 bytecode is produced
-    }
+	tasks.withType(JavaCompile).configureEach {
+		sourceCompatibility = '16'
+		targetCompatibility = '16'
+		options.release.set(16)
+	}
 }
 
 project("spine-libgdx") {
-    apply plugin: "java-library"
-    apply plugin: "maven-publish"
-    apply plugin: "signing"
+	apply plugin: "java-library"
+	apply plugin: "maven-publish"
+	apply plugin: "signing"
 
-    sourceSets {
-        main {
-            resources {
-                srcDirs = ["src"]  // Add this line to include non-Java files from src directory
-                include "**/*.gwt.xml"  // Add this to specifically include GWT module files
-            }
-        }
-    }
+	sourceSets {
+		main {
+			resources {
+				srcDirs = ["src"]  // Add this line to include non-Java files from src directory
+				include "**/*.gwt.xml"  // Add this to specifically include GWT module files
+			}
+		}
+	}
 
-    dependencies {
-        implementation "com.badlogicgames.gdx:gdx:$libgdxVersion"
-    }
+	dependencies {
+		implementation "com.badlogicgames.gdx:gdx:$libgdxVersion"
+	}
 }
 apply from: 'publishing.gradle'
 
 project("spine-skeletonviewer") {
-    jar {
-        duplicatesStrategy = DuplicatesStrategy.INCLUDE
+	jar {
+		duplicatesStrategy = DuplicatesStrategy.INCLUDE
 
-        manifest {
-            attributes "Main-Class": "com.esotericsoftware.spine.SkeletonViewer"
-        }
+		manifest {
+			attributes "Main-Class": "com.esotericsoftware.spine.SkeletonViewer"
+		}
 
-        from {
-            configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
-        }
+		from {
+			configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
+		}
 
-        dependsOn(project(":spine-libgdx").tasks.named('jar'))
-    }
+		dependsOn(project(":spine-libgdx").tasks.named('jar'))
+	}
 
-    tasks.named('build').configure {
-        dependsOn(tasks.named('jar'))
-    }
+	tasks.named('build').configure {
+		dependsOn(tasks.named('jar'))
+	}
 
-    tasks.withType(JavaCompile).configureEach {
-        sourceCompatibility = '1.8'
-        targetCompatibility = '1.8'
-        options.release.set(8)  // Ensures Java 8 bytecode is produced
-    }
+	tasks.withType(JavaCompile).configureEach {
+		sourceCompatibility = '16'
+		targetCompatibility = '16'
+		options.release.set(16)
+	}
 }
 
 configure(subprojects - project("spine-libgdx")) {
-    sourceSets.main.resources.srcDirs = ["assets"]
+	sourceSets.main.resources.srcDirs = ["assets"]
 
-    dependencies {
-        implementation project(":spine-libgdx")
-        implementation "com.badlogicgames.gdx:gdx:$libgdxVersion"
-        implementation "com.badlogicgames.gdx:gdx-platform:$libgdxVersion:natives-desktop"
-        implementation "com.badlogicgames.gdx:gdx-backend-lwjgl3:$libgdxVersion"
-        implementation "com.badlogicgames.gdx:gdx-box2d:$libgdxVersion"
-        implementation "com.badlogicgames.gdx:gdx-box2d-platform:$libgdxVersion:natives-desktop"
-    }
+	dependencies {
+		implementation project(":spine-libgdx")
+		implementation "com.badlogicgames.gdx:gdx:$libgdxVersion"
+		implementation "com.badlogicgames.gdx:gdx-platform:$libgdxVersion:natives-desktop"
+		implementation "com.badlogicgames.gdx:gdx-backend-lwjgl3:$libgdxVersion"
+		implementation "com.badlogicgames.gdx:gdx-box2d:$libgdxVersion"
+		implementation "com.badlogicgames.gdx:gdx-box2d-platform:$libgdxVersion:natives-desktop"
+	}
 }
 
 tasks.withType(JavaCompile).configureEach {
-    println "Building with sourceCompatibility = ${sourceCompatibility}, targetCompatibility = ${targetCompatibility}"
+	println "Building with sourceCompatibility = ${sourceCompatibility}, targetCompatibility = ${targetCompatibility}"
 }
diff --git a/spine-libgdx/publishing.gradle b/spine-libgdx/publishing.gradle
index d0fc1bb75..23e2d9dfd 100644
--- a/spine-libgdx/publishing.gradle
+++ b/spine-libgdx/publishing.gradle
@@ -1,89 +1,89 @@
 ext {
-    libraryVersion = "4.2.9-SNAPSHOT"
+	libraryVersion = "4.2.9-SNAPSHOT"
 }
 
 project("spine-libgdx") {
-    apply plugin: "java-library"
-    apply plugin: "maven-publish"
-    apply plugin: "signing"
+	apply plugin: "java-library"
+	apply plugin: "maven-publish"
+	apply plugin: "signing"
 
-    dependencies {
-        implementation "com.badlogicgames.gdx:gdx:$libgdxVersion"
-    }
+	dependencies {
+		implementation "com.badlogicgames.gdx:gdx:$libgdxVersion"
+	}
 
-    tasks.register("sourceJar", Jar) {
-        archiveClassifier.set("sources")
-        from(sourceSets.main.allJava)
-    }
+	tasks.register("sourceJar", Jar) {
+		archiveClassifier.set("sources")
+		from(sourceSets.main.allJava)
+	}
 
-    tasks.javadoc {
-        failOnError = false
-    }
+	tasks.javadoc {
+		failOnError = false
+	}
 
-    tasks.register("javadocJar", Jar) {
-        dependsOn javadoc
-        archiveClassifier.set("javadoc")
-        from(javadoc.destinationDir)
-    }
+	tasks.register("javadocJar", Jar) {
+		dependsOn javadoc
+		archiveClassifier.set("javadoc")
+		from(javadoc.destinationDir)
+	}
 
-    afterEvaluate {
-        publishing {
-            publications {
-                create("release", MavenPublication) {
-                    from(components.java)
-                    artifact(tasks.getByName("sourceJar"))
-                    artifact(tasks.getByName("javadocJar"))
+	afterEvaluate {
+		publishing {
+			publications {
+				create("release", MavenPublication) {
+					from(components.java)
+					artifact(tasks.getByName("sourceJar"))
+					artifact(tasks.getByName("javadocJar"))
 
-                    groupId = "com.esotericsoftware.spine"
-                    artifactId = "spine-libgdx"
-                    version = libraryVersion
+					groupId = "com.esotericsoftware.spine"
+					artifactId = "spine-libgdx"
+					version = libraryVersion
 
-                    pom {
-                        packaging = "jar"
-                        name.set("spine-libgdx")
-                        description.set("Spine Runtime for libGDX")
-                        url.set("https://github.com/esotericsoftware/spine-runtimes")
-                        licenses {
-                            license {
-                                name.set("Spine Runtimes License")
-                                url.set("https://esotericsoftware.com/spine-runtimes-license")
-                            }
-                        }
-                        developers {
-                            developer {
-                                name.set("Esoteric Software")
-                                email.set("contact@esotericsoftware.com")
-                            }
-                        }
-                        scm {
-                            url.set(pom.url.get())
-                            connection.set("scm:git:${url.get()}.git")
-                            developerConnection.set("scm:git:${url.get()}.git")
-                        }
-                    }
-                }
-            }
+					pom {
+						packaging = "jar"
+						name.set("spine-libgdx")
+						description.set("Spine Runtime for libGDX")
+						url.set("https://github.com/esotericsoftware/spine-runtimes")
+						licenses {
+							license {
+								name.set("Spine Runtimes License")
+								url.set("https://esotericsoftware.com/spine-runtimes-license")
+							}
+						}
+						developers {
+							developer {
+								name.set("Esoteric Software")
+								email.set("contact@esotericsoftware.com")
+							}
+						}
+						scm {
+							url.set(pom.url.get())
+							connection.set("scm:git:${url.get()}.git")
+							developerConnection.set("scm:git:${url.get()}.git")
+						}
+					}
+				}
+			}
 
-            repositories {
-                maven {
-                    name = "SonaType"
-                    url = uri(libraryVersion.endsWith("-SNAPSHOT") ?
-                            "https://oss.sonatype.org/content/repositories/snapshots" :
-                            "https://oss.sonatype.org/service/local/staging/deploy/maven2")
+			repositories {
+				maven {
+					name = "SonaType"
+					url = uri(libraryVersion.endsWith("-SNAPSHOT") ?
+							"https://oss.sonatype.org/content/repositories/snapshots" :
+							"https://oss.sonatype.org/service/local/staging/deploy/maven2")
 
-                    credentials {
-                        username = project.findProperty("ossrhUsername")
-                        password = project.findProperty("ossrhPassword")
-                    }
-                }
-            }
-        }
+					credentials {
+						username = project.findProperty("ossrhUsername")
+						password = project.findProperty("ossrhPassword")
+					}
+				}
+			}
+		}
 
-        if (!libraryVersion.endsWith("-SNAPSHOT")) {
-            signing {
-                useGpgCmd()
-                sign(publishing.publications["release"])
-            }
-        }
-    }
+		if (!libraryVersion.endsWith("-SNAPSHOT")) {
+			signing {
+				useGpgCmd()
+				sign(publishing.publications["release"])
+			}
+		}
+	}
 }
diff --git a/spine-libgdx/spine-libgdx/pom.xml b/spine-libgdx/spine-libgdx/pom.xml
index 4df1aecb4..23633c276 100644
--- a/spine-libgdx/spine-libgdx/pom.xml
+++ b/spine-libgdx/spine-libgdx/pom.xml
@@ -76,8 +76,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.1</version>
 				<configuration>
-					<source>1.7</source>
-					<target>1.7</target>
+					<source>16</source>
+					<target>16</target>
 					<fork>true</fork>
 					<showWarnings>true</showWarnings>
 				</configuration>