diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..6cd310d
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Interguess
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
index ac08ac5..a4f2e01 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Java Module loader is a framework to load .jar archives with Java modules and to
 ```gradle
 repositories {
     maven {
-        url 'https://repo.interguessweb.de/maven-public/'
+        url 'https://repo.interguess.de/maven-public/'
     }
 }
 ```
@@ -21,7 +21,7 @@ dependencies {
 <repositories>
     <repository>
         <id>interguess-repo</id>
-        <url>https://repo.interguessweb.de/maven-public/</url>
+        <url>https://repo.interguess.de/maven-public/</url>
     </repository>
 </repositories>
 ```
diff --git a/build.gradle b/build.gradle
index 6272149..8a9f320 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,14 +4,14 @@ plugins {
 }
 
 group 'de.interguess'
-version '1.0-beta'
+version '1.0.1-beta'
 
 repositories {
     mavenCentral()
 }
 
 dependencies {
-    compileOnly 'org.jetbrains:annotations:24.1.0'
+    compileOnly 'org.jetbrains:annotations:26.0.2'
 }
 
 publishing {
diff --git a/src/main/java/de/interguess/javamoduleloader/module/Module.java b/src/main/java/de/interguess/javamoduleloader/module/Module.java
index 0f9081b..a8225d3 100644
--- a/src/main/java/de/interguess/javamoduleloader/module/Module.java
+++ b/src/main/java/de/interguess/javamoduleloader/module/Module.java
@@ -1,5 +1,6 @@
 package de.interguess.javamoduleloader.module;
 
+import de.interguess.javamoduleloader.exception.ModuleLoadException;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -44,7 +45,7 @@ public interface Module<T> {
      * @param requiredSuperClass the required superclass of the main class
      * @param mainClass          the name of the main class
      * @return the main class of the module
-     * @throws ClassNotFoundException if the main class could not be found
+     * @throws ModuleLoadException if there was an error loading or verifying the main class
      */
-    @NotNull Class<T> getMainClassByName(@NotNull Class<T> requiredSuperClass, @NotNull String mainClass) throws ClassNotFoundException;
+    @NotNull Class<T> getMainClassByName(@NotNull Class<T> requiredSuperClass, @NotNull String mainClass) throws ModuleLoadException;
 }
\ No newline at end of file
diff --git a/src/main/java/de/interguess/javamoduleloader/module/SimpleModule.java b/src/main/java/de/interguess/javamoduleloader/module/SimpleModule.java
index 71c765f..679df2c 100644
--- a/src/main/java/de/interguess/javamoduleloader/module/SimpleModule.java
+++ b/src/main/java/de/interguess/javamoduleloader/module/SimpleModule.java
@@ -50,15 +50,17 @@ public SimpleModule(File file) throws ModuleLoadException {
     }
 
     @Override
-    public @NotNull Class<T> getMainClassByName(@NotNull Class<T> requiredSuperClass, @NotNull String mainClass) throws ClassNotFoundException {
-        Class<?> clazz = classLoader.loadClass(mainClass);
+    public @NotNull Class<T> getMainClassByName(@NotNull Class<T> requiredSuperClass, @NotNull String mainClass) throws ModuleLoadException {
+        try {
+            Class<?> clazz = classLoader.loadClass(mainClass);
+
+            if (!requiredSuperClass.isAssignableFrom(clazz)) {
+                throw new ModuleLoadException("Class " + mainClass + " does not extend or implement " + requiredSuperClass.getName());
+            }
 
-        if (clazz == null) {
-            throw new ClassNotFoundException("Class not found: " + mainClass);
-        } else if (!clazz.getSuperclass().equals(requiredSuperClass)) {
-            throw new ClassNotFoundException("Class " + mainClass + " does not implement " + requiredSuperClass.getName());
-        } else {
             return (Class<T>) clazz;
+        } catch (ClassNotFoundException e) {
+            throw new ModuleLoadException("Class not found: " + mainClass, e);
         }
     }
 }