diff -r 4f1c026a8aab -r f962ff9dd44e src/main/java/de/uapcore/lightpit/AbstractLightPITServlet.java
--- a/src/main/java/de/uapcore/lightpit/AbstractLightPITServlet.java	Wed May 13 18:33:25 2020 +0200
+++ b/src/main/java/de/uapcore/lightpit/AbstractLightPITServlet.java	Wed May 13 18:40:52 2020 +0200
@@ -98,7 +98,19 @@
     private ResponseType invokeMapping(Method method, HttpServletRequest req, HttpServletResponse resp, DataAccessObjects dao) throws IOException {
         try {
             LOG.trace("invoke {}#{}", method.getDeclaringClass().getName(), method.getName());
-            return (ResponseType) method.invoke(this, req, resp, dao);
+            final var paramTypes = method.getParameterTypes();
+            final var paramValues = new Object[paramTypes.length];
+            for (int i = 0; i < paramTypes.length; i++) {
+                if (paramTypes[i].isAssignableFrom(HttpServletRequest.class)) {
+                    paramValues[i] = req;
+                } else if (paramTypes[i].isAssignableFrom(HttpServletResponse.class)) {
+                    paramValues[i] = resp;
+                }
+                if (paramTypes[i].isAssignableFrom(DataAccessObjects.class)) {
+                    paramValues[i] = dao;
+                }
+            }
+            return (ResponseType) method.invoke(this, paramValues);
         } catch (ReflectiveOperationException | ClassCastException ex) {
             LOG.error("invocation of method {} failed: {}", method.getName(), ex.getMessage());
             LOG.debug("Details: ", ex);
@@ -144,12 +156,13 @@
                         continue;
                     }
 
-                    Class<?>[] params = method.getParameterTypes();
-                    if (params.length == 3
-                            && HttpServletRequest.class.isAssignableFrom(params[0])
-                            && HttpServletResponse.class.isAssignableFrom(params[1])
-                            && DataAccessObjects.class.isAssignableFrom(params[2])) {
-
+                    boolean paramsInjectible = true;
+                    for (var param : method.getParameterTypes()) {
+                        paramsInjectible &= HttpServletRequest.class.isAssignableFrom(param)
+                                || HttpServletResponse.class.isAssignableFrom(param)
+                                || DataAccessObjects.class.isAssignableFrom(param);
+                    }
+                    if (paramsInjectible) {
                         final String requestPath = "/" + mapping.get().requestPath();
 
                         if (mappings
@@ -168,7 +181,7 @@
                                 method.getName()
                         );
                     } else {
-                        LOG.warn("{} is annotated with {} but has the wrong parameters - (HttpServletRequest,HttpServletResponse,DataAccessObjects) required",
+                        LOG.warn("{} is annotated with {} but has the wrong parameters - only HttpServletRequest. HttpServletResponse, and DataAccessObjects are allowed",
                                 method.getName(), RequestMapping.class.getSimpleName()
                         );
                     }