diff --git a/groovier-engine/pom.xml b/groovier-engine/pom.xml
index 673b09b..e0352e7 100644
--- a/groovier-engine/pom.xml
+++ b/groovier-engine/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>groovier</artifactId>
         <groupId>org.groovier</groupId>
-        <version>0.0.4</version>
+        <version>0.0.51-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/groovier-engine/src/main/java/com/ericlam/mc/groovier/GroovierAddon.java b/groovier-engine/src/main/java/com/ericlam/mc/groovier/GroovierAddon.java
new file mode 100644
index 0000000..5a26fe4
--- /dev/null
+++ b/groovier-engine/src/main/java/com/ericlam/mc/groovier/GroovierAddon.java
@@ -0,0 +1,15 @@
+package com.ericlam.mc.groovier;
+
+import com.google.inject.Module;
+
+/**
+ * groovier addon
+ */
+public interface GroovierAddon {
+	
+	/**
+	 * install guice module
+	 * @param module module
+	 */
+	void installModule(Module module);
+}
diff --git a/groovier-plugin/pom.xml b/groovier-plugin/pom.xml
index 2ea5bc5..3d99a7a 100644
--- a/groovier-plugin/pom.xml
+++ b/groovier-plugin/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>groovier</artifactId>
         <groupId>org.groovier</groupId>
-        <version>0.0.4</version>
+        <version>0.0.51-SNAPSHOT</version>
     </parent>
 
 
diff --git a/groovier-plugin/src/main/groovy/com/ericlam/mc/groovier/GroovierCore.java b/groovier-plugin/src/main/groovy/com/ericlam/mc/groovier/GroovierCore.java
index b78ff03..32d0881 100644
--- a/groovier-plugin/src/main/groovy/com/ericlam/mc/groovier/GroovierCore.java
+++ b/groovier-plugin/src/main/groovy/com/ericlam/mc/groovier/GroovierCore.java
@@ -1,160 +1,180 @@
 package com.ericlam.mc.groovier;
 
-import com.ericlam.mc.groovier.providers.ArgumentParserProvider;
-import com.ericlam.mc.groovier.providers.GroovierLifeCycleProvider;
-import com.ericlam.mc.groovier.providers.ServiceInjectorProvider;
-import com.ericlam.mc.groovier.scriptloaders.*;
-import com.google.inject.Guice;
-import com.google.inject.Injector;
-
-import javax.inject.Provider;
 import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
-import java.nio.file.*;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.FileVisitResult;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.SimpleFileVisitor;
+import java.nio.file.StandardCopyOption;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.Collections;
 import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
+import java.util.logging.Level;
 
-public class GroovierCore implements GroovierAPI {
-
-    private final GroovierModule groovierModule = new GroovierModule();
-
-    private static GroovierAPI api;
-
-    public GroovierCore() {
-        api = this;
-
-        this.bindInstance(GroovierAPI.class, this);
-        this.addScriptLoader(ServiceScriptsManager.class);
-        this.addScriptLoader(CommandScriptsManager.class);
-        this.addScriptLoader(EventScriptsManager.class);
-        this.addScriptLoader(ArgumentScriptManager.class);
-        this.addScriptLoader(LifeCycleScriptsManager.class);
-        this.bindProvider(ArgumentParser.class, ArgumentParserProvider.class);
-        this.bindProvider(ServiceInjector.class, ServiceInjectorProvider.class);
-        this.bindProvider(GroovierLifeCycle.class, GroovierLifeCycleProvider.class);
-    }
+import javax.inject.Provider;
 
-    public static GroovierAPI getApi() {
-        return Optional.ofNullable(api).orElseThrow(() -> new IllegalStateException("groovier not initialized"));
-    }
+import org.jetbrains.annotations.NotNull;
 
-    private Injector injector;
-    private GroovierScriptLoader loader;
+import com.ericlam.mc.groovier.providers.ArgumentParserProvider;
+import com.ericlam.mc.groovier.providers.GroovierLifeCycleProvider;
+import com.ericlam.mc.groovier.providers.ServiceInjectorProvider;
+import com.ericlam.mc.groovier.scriptloaders.ArgumentScriptManager;
+import com.ericlam.mc.groovier.scriptloaders.CommandScriptsManager;
+import com.ericlam.mc.groovier.scriptloaders.EventScriptsManager;
+import com.ericlam.mc.groovier.scriptloaders.GroovierLifeCycle;
+import com.ericlam.mc.groovier.scriptloaders.LifeCycleScriptsManager;
+import com.ericlam.mc.groovier.scriptloaders.ServiceScriptsManager;
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import com.google.inject.Module;
+
+public class GroovierCore implements GroovierAPI, GroovierAddon {
+
+	private final GroovierModule groovierModule = new GroovierModule();
+
+	private static GroovierAPI api;
+
+	public GroovierCore() {
+		api = this;
+
+		this.bindInstance(GroovierAPI.class, this);
+		this.addScriptLoader(ServiceScriptsManager.class);
+		this.addScriptLoader(CommandScriptsManager.class);
+		this.addScriptLoader(EventScriptsManager.class);
+		this.addScriptLoader(ArgumentScriptManager.class);
+		this.addScriptLoader(LifeCycleScriptsManager.class);
+		this.bindProvider(ArgumentParser.class, ArgumentParserProvider.class);
+		this.bindProvider(ServiceInjector.class, ServiceInjectorProvider.class);
+		this.bindProvider(GroovierLifeCycle.class, GroovierLifeCycleProvider.class);
+	}
 
-    private GroovierLifeCycle lifeCycle;
+	public static GroovierAPI getApi() {
+		return Optional.ofNullable(api).orElseThrow(() -> new IllegalStateException("groovier not initialized"));
+	}
 
+	private Injector injector;
+	private GroovierScriptLoader loader;
 
-    public void onLoad(ScriptPlugin plugin) {
-        groovierModule.bindScriptPlugin(plugin);
-        plugin.copyResources();
-    }
+	private GroovierLifeCycle lifeCycle;
 
 
-    public void onEnable(ScriptPlugin plugin) {
-        injector = Guice.createInjector(groovierModule);
-        loader = injector.getInstance(GroovierScriptLoader.class);
-        loader.addClassPath();
-        loader.loadAllScripts().whenComplete((v, e) -> {
-            if (e != null) {
-                plugin.getLogger().severe("error while loading scripts: "+e.getMessage());
-                e.printStackTrace();
-            }
-            lifeCycle = injector.getInstance(GroovierLifeCycle.class);
-            plugin.runSyncTask(() -> lifeCycle.onEnable());
-        });
-    }
+	public void onLoad(ScriptPlugin plugin) {
+		groovierModule.bindScriptPlugin(plugin);
+		plugin.copyResources();
+	}
+
+
+	public void onEnable(ScriptPlugin plugin) {
+		injector = Guice.createInjector(groovierModule);
+		loader = injector.getInstance(GroovierScriptLoader.class);
+		loader.addClassPath();
+		loader.loadAllScripts().whenComplete((v, e) -> {
+			if (e != null) {
+				plugin.getLogger().log(Level.SEVERE, e, () -> "error while loading scripts: " + e.getMessage());
+			}
+			lifeCycle = injector.getInstance(GroovierLifeCycle.class);
+			plugin.runSyncTask(() -> lifeCycle.onEnable());
+		});
+	}
 
-    public void onDisable(ScriptPlugin plugin) {
-        lifeCycle.onDisable();
-        loader.unloadAllScripts();
-    }
+	public void onDisable(ScriptPlugin plugin) {
+		lifeCycle.onDisable();
+		loader.unloadAllScripts();
+	}
 
-    public CompletableFuture<Void> reloadAllScripts(){
-        return loader.reloadAllScripts();
-    }
+	public CompletableFuture<Void> reloadAllScripts() {
+		return loader.reloadAllScripts();
+	}
 
-    @Override
-    public void addScriptLoader(Class<? extends ScriptLoader> scriptLoader) {
-        this.groovierModule.addReloadable(scriptLoader);
-    }
+	@Override
+	public void addScriptLoader(Class<? extends ScriptLoader> scriptLoader) {
+		this.groovierModule.addReloadable(scriptLoader);
+	}
 
-    @Override
-    public <T extends ScriptValidator> void bindRegisters(Class<T> validator, T ins) {
-        this.groovierModule.bindRegisters(validator, ins);
-    }
+	@Override
+	public <T extends ScriptValidator> void bindRegisters(Class<T> validator, T ins) {
+		this.groovierModule.bindRegisters(validator, ins);
+	}
 
-    @Override
-    public <T> void bindInstance(Class<T> type, T ins) {
-        this.groovierModule.bindInstance(type, ins);
-    }
+	@Override
+	public <T> void bindInstance(Class<T> type, T ins) {
+		this.groovierModule.bindInstance(type, ins);
+	}
 
-    @Override
-    public <T, V extends T> void bindType(Class<T> type, Class<V> clazz) {
-        this.groovierModule.bindType(type, clazz);
-    }
+	@Override
+	public <T, V extends T> void bindType(Class<T> type, Class<V> clazz) {
+		this.groovierModule.bindType(type, clazz);
+	}
 
-    @Override
-    public <T, P extends Provider<T>> void bindProvider(Class<T> type, Class<P> clazz) {
-        this.groovierModule.bindProvider(type, clazz);
-    }
+	@Override
+	public <T, P extends Provider<T>> void bindProvider(Class<T> type, Class<P> clazz) {
+		this.groovierModule.bindProvider(type, clazz);
+	}
 
-    @Override
-    public Injector getBaseInjector() {
-        return Optional.ofNullable(injector).orElseThrow(() -> new IllegalStateException("groovier not initialized"));
-    }
+	@Override
+	public void installModule(Module module) {
+		this.groovierModule.installModule(module);
+	}
 
-    @Override
-    public ServiceInjector getServiceInjector() {
-        return getBaseInjector().getInstance(ServiceInjector.class);
-    }
+	@Override
+	public Injector getBaseInjector() {
+		return Optional.ofNullable(injector).orElseThrow(() -> new IllegalStateException("groovier not initialized"));
+	}
 
-    @Override
-    public ArgumentParser getArgumentParser() {
-        return getBaseInjector().getInstance(ArgumentParser.class);
-    }
+	@Override
+	public ServiceInjector getServiceInjector() {
+		return getBaseInjector().getInstance(ServiceInjector.class);
+	}
 
-    public void copyFromJar(String source, final Path target) throws URISyntaxException, IOException {
+	@Override
+	public ArgumentParser getArgumentParser() {
+		return getBaseInjector().getInstance(ArgumentParser.class);
+	}
 
-        URL url = getClass().getResource("");
+	public void copyFromJar(String source, final Path target) throws URISyntaxException, IOException {
 
-        if (url == null) {
-            throw new IllegalStateException("can't find resource inside jar");
-        }
-
-        URI resource = url.toURI();
+		URL url = getClass().getResource("");
+
+		if (url == null) {
+			throw new IllegalStateException("can't find resource inside jar");
+		}
+
+		URI resource = url.toURI();
 
-        try (FileSystem fileSystem = FileSystems.newFileSystem(
-                resource,
-                Collections.<String, String>emptyMap()
-        )) {
+		try (FileSystem fileSystem = FileSystems.newFileSystem(
+				resource,
+				Collections.<String, String>emptyMap()
+		)) {
 
 
-            final Path jarPath = fileSystem.getPath(source);
+			final Path jarPath = fileSystem.getPath(source);
 
-            Files.walkFileTree(jarPath, new SimpleFileVisitor<>() {
+			Files.walkFileTree(jarPath, new SimpleFileVisitor<>() {
 
-                @Override
-                public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
-                    Path currentTarget = target.resolve(jarPath.relativize(dir).toString());
-                    if (Files.notExists(currentTarget)) Files.createDirectories(currentTarget);
-                    return FileVisitResult.CONTINUE;
-                }
+				@Override
+				public @NotNull FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
+					Path currentTarget = target.resolve(jarPath.relativize(dir).toString());
+					if (Files.notExists(currentTarget)) Files.createDirectories(currentTarget);
+					return FileVisitResult.CONTINUE;
+				}
 
-                @Override
-                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-                    var targetPath = target.resolve(jarPath.relativize(file).toString());
-                    if (Files.notExists(targetPath)) Files.copy(file, targetPath, StandardCopyOption.REPLACE_EXISTING);
-                    return FileVisitResult.CONTINUE;
-                }
+				@Override
+				public @NotNull FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+					var targetPath = target.resolve(jarPath.relativize(file).toString());
+					if (Files.notExists(targetPath)) Files.copy(file, targetPath, StandardCopyOption.REPLACE_EXISTING);
+					return FileVisitResult.CONTINUE;
+				}
+
+			});
+
+		}
 
-            });
 
-        }
-
-
-    }
+	}
 }
diff --git a/groovier-plugin/src/main/groovy/com/ericlam/mc/groovier/GroovierModule.groovy b/groovier-plugin/src/main/groovy/com/ericlam/mc/groovier/GroovierModule.groovy
index 4921f6e..2b9687f 100644
--- a/groovier-plugin/src/main/groovy/com/ericlam/mc/groovier/GroovierModule.groovy
+++ b/groovier-plugin/src/main/groovy/com/ericlam/mc/groovier/GroovierModule.groovy
@@ -1,6 +1,7 @@
 package com.ericlam.mc.groovier
 
 import com.google.inject.AbstractModule
+import com.google.inject.Module
 import com.google.inject.Scopes
 import com.google.inject.multibindings.Multibinder
 
@@ -13,7 +14,9 @@ class GroovierModule extends AbstractModule {
 
     private final Map<Class, Object> registerMap = new HashMap<>()
     private final Map<Class, Class> classMap = new HashMap<>()
-    private final Map<Class, Class<Provider<?>>> providerMap = new HashMap<>();
+    private final Map<Class, Class<Provider<?>>> providerMap = new HashMap<>()
+
+    private final Set<Module> modules = new HashSet<>()
 
     private final GroovyClassLoader classLoader = new GroovyClassLoader(getClass().getClassLoader())
 
@@ -34,6 +37,7 @@ class GroovierModule extends AbstractModule {
         registerMap.forEach((type, obj) -> bind(type).toInstance(obj))
         classMap.forEach((type, clazz) -> bind(type).to(clazz).in(Scopes.SINGLETON))
         providerMap.forEach((type, provider) -> bind(type).toProvider(provider).in(Scopes.SINGLETON))
+        modules.forEach(this::install)
     }
 
 
@@ -61,4 +65,8 @@ class GroovierModule extends AbstractModule {
         this.registerMap.put(validator, ins)
     }
 
+    def installModule(Module module) {
+        this.modules.add(module)
+    }
+
 }
diff --git a/groovier-scripts/pom.xml b/groovier-scripts/pom.xml
index ab5e663..2e9d239 100644
--- a/groovier-scripts/pom.xml
+++ b/groovier-scripts/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>groovier</artifactId>
         <groupId>org.groovier</groupId>
-        <version>0.0.4</version>
+        <version>0.0.51-SNAPSHOT</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
diff --git a/pom.xml b/pom.xml
index c96463b..737f0e9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>org.groovier</groupId>
     <artifactId>groovier</artifactId>
-    <version>0.0.4</version>
+    <version>0.0.51-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>Groovier</name>
@@ -260,7 +260,7 @@
             <dependency>
                 <groupId>org.junit.jupiter</groupId>
                 <artifactId>junit-jupiter-engine</artifactId>
-                <version>5.3.1</version>
+                <version>5.11.4</version>
                 <scope>test</scope>
             </dependency>
         </dependencies>