Can't instantiate Reflections class when running Jar

I am trying to instantiate the Reflections class (org.reflections.Reflections) when I run my Jar. I build my project using Maven:

<dependency>
    <groupId>org.reflections</groupId>
    <artifactId>reflections</artifactId>
    <version>0.9.10</version>
</dependency>

When I run the application from within IntelliJ it just works. However, on my collegues computer it doesn't, and it doesn't work when I run the Jar created by Maven. My computer gives the following exception:

Exception in thread "main" java.lang.NoClassDefFoundError: org/reflections/Reflections
    at nl.yacht.lakesideresort.controller.CommandLineInterpreter.loadGuiClasses(CommanLineInterpreter.java:30)
    at nl.yacht.lakesideresort.controller.CommandLineInterpreter.<init>(CommandLineInterpreter.java:25)
    at nl.yacht.lakesideresort.Main.main(Main.java:12) Caused by: java.lang.ClassNotFoundException: org.reflections.Reflections
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 3 more

The code I'm trying to run is:

Reflections reflections = new Reflections(ClasspathHelper.forPackage("nl.yacht.lakesideresort.controller.gui"));
Set<Class<?>> annotated = reflections.getTypesAnnotatedWith(Gui.class);
for(Class<?> kl : annotated){
    Gui gui = kl.getAnnotation(Gui.class);
    String name = gui.name().toUpperCase();
    try {
        map.put(name, (Command) kl.newInstance());
    } catch (Exception e) {
        System.out.println("Couldn't load class " + name);
    }
}

Even if I comment out everything underneath the Reflections reflections = new ... line I will get the exception.

Why can't I instantiate the Reflections class in the Jar?