diff --git a/build.gradle b/build.gradle
index 6b0727b..2cab2ff 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,6 +5,10 @@ plugins {
     id 'com.palantir.git-version' version '0.11.0'
 }
 
+compileJava {
+    sourceCompatibility = "1.8"
+}
+
 dependencies {
 	implementation 'commons-cli:commons-cli:1.4'
 	implementation 'com.moandjiezana.toml:toml4j:0.7.2'
diff --git a/src/main/java/link/infra/packwiz/installer/ui/InstallWindow.java b/src/main/java/link/infra/packwiz/installer/ui/InstallWindow.java
index 7c4fe90..2f756ac 100644
--- a/src/main/java/link/infra/packwiz/installer/ui/InstallWindow.java
+++ b/src/main/java/link/infra/packwiz/installer/ui/InstallWindow.java
@@ -119,7 +119,7 @@ public class InstallWindow implements IUserInterface {
 	@Override
 	public void executeManager(Runnable task) {
 		EventQueue.invokeLater(() -> {
-			worker = new SwingWorkerButWithPublicPublish<>() {
+			worker = new SwingWorkerButWithPublicPublish<Void, InstallProgress>() {
 
 				@Override
 				protected Void doInBackground() {