diff --git a/src/imp.rs b/src/imp.rs
index 9a58dab..a6fcfa2 100644
--- a/src/imp.rs
+++ b/src/imp.rs
@@ -75,7 +75,7 @@ impl BehaviourBuilder {
 /// Trait to be used by implementors of imp bots to supply their custom event handling
 /// the handle function is called after the default imp automatic event handling has run on each new event
 pub trait EventHandler {
-    fn handle(&self, cwtch: &dyn CwtchLib, profile: Option<&Profile>, event: CwtchEvent);
+    fn handle(&mut self, cwtch: &dyn CwtchLib, profile: Option<&Profile>, event: CwtchEvent);
 }
 
 /// Cwtch bot
@@ -102,7 +102,7 @@ impl Imp {
     }
 
     /// The main event loop handler for the bot, supply your own customer handler to handle events after the imp's automatic handling has processed the event
-    pub fn event_loop(&mut self, handler: Box<dyn EventHandler>) {
+    pub fn event_loop<T>(&mut self, handler: &mut T) where T : EventHandler {
         let mut initialized: bool = false;
 
         loop {