diff --git a/src/core/gba.rs b/src/core/gba.rs
index 1f69126..8cc68b5 100644
--- a/src/core/gba.rs
+++ b/src/core/gba.rs
@@ -11,33 +11,23 @@ use super::sysbus::SysBus;
 
 use super::super::{AudioInterface, InputInterface, VideoInterface};
 
-pub struct GameBoyAdvance<V, A, I>
-where
-    V: VideoInterface,
-    A: AudioInterface,
-    I: InputInterface,
-{
+pub struct GameBoyAdvance {
     pub sysbus: Box<SysBus>,
     pub cpu: Core,
-    video_device: Rc<RefCell<V>>,
-    audio_device: Rc<RefCell<A>>,
-    input_device: Rc<RefCell<I>>,
+    video_device: Rc<RefCell<dyn VideoInterface>>,
+    audio_device: Rc<RefCell<dyn AudioInterface>>,
+    input_device: Rc<RefCell<dyn InputInterface>>,
 }
 
-impl<V, A, I> GameBoyAdvance<V, A, I>
-where
-    V: VideoInterface,
-    A: AudioInterface,
-    I: InputInterface,
-{
+impl GameBoyAdvance {
     pub fn new(
         cpu: Core,
         bios_rom: Vec<u8>,
         gamepak: Cartridge,
-        video_device: Rc<RefCell<V>>,
-        audio_device: Rc<RefCell<A>>,
-        input_device: Rc<RefCell<I>>,
-    ) -> GameBoyAdvance<V, A, I> {
+        video_device: Rc<RefCell<dyn VideoInterface>>,
+        audio_device: Rc<RefCell<dyn AudioInterface>>,
+        input_device: Rc<RefCell<dyn InputInterface>>,
+    ) -> GameBoyAdvance {
         let io = IoDevices::new();
         GameBoyAdvance {
             cpu: cpu,
diff --git a/src/debugger/command.rs b/src/debugger/command.rs
index a0aab9e..ab6836f 100644
--- a/src/debugger/command.rs
+++ b/src/debugger/command.rs
@@ -63,12 +63,7 @@ pub enum Command {
     TraceToggle(TraceFlags),
 }
 
-impl<V, A, I> Debugger<V, A, I>
-where
-    V: VideoInterface,
-    A: AudioInterface,
-    I: InputInterface,
-{
+impl Debugger {
     pub fn run_command(&mut self, command: Command) {
         use Command::*;
         match command {
diff --git a/src/debugger/mod.rs b/src/debugger/mod.rs
index 79f144f..f382196 100644
--- a/src/debugger/mod.rs
+++ b/src/debugger/mod.rs
@@ -48,25 +48,15 @@ impl From<::std::io::Error> for DebuggerError {
 
 type DebuggerResult<T> = Result<T, DebuggerError>;
 
-pub struct Debugger<V, A, I>
-where
-    V: VideoInterface,
-    A: AudioInterface,
-    I: InputInterface,
-{
-    pub gba: GameBoyAdvance<V, A, I>,
+pub struct Debugger {
+    pub gba: GameBoyAdvance,
     running: bool,
     pub ctrlc_flag: Arc<AtomicBool>,
     pub previous_command: Option<Command>,
 }
 
-impl<V, A, I> Debugger<V, A, I>
-where
-    V: VideoInterface,
-    A: AudioInterface,
-    I: InputInterface,
-{
-    pub fn new(gba: GameBoyAdvance<V, A, I>) -> Debugger<V, A, I> {
+impl Debugger {
+    pub fn new(gba: GameBoyAdvance) -> Debugger {
         let ctrlc_flag = Arc::new(AtomicBool::new(true));
         let r = ctrlc_flag.clone();
         ctrlc::set_handler(move || {
diff --git a/src/plat/minifb/main.rs b/src/plat/minifb/main.rs
index b2ad942..e84a4ca 100644
--- a/src/plat/minifb/main.rs
+++ b/src/plat/minifb/main.rs
@@ -117,7 +117,7 @@ fn main() {
     }));
 
     let mut fps_counter = FpsCounter::default();
-    let mut gba: GameBoyAdvance<MiniFb, MiniFb, MiniFb> = GameBoyAdvance::new(
+    let mut gba = GameBoyAdvance::new(
         cpu,
         bios_bin,
         cart,
diff --git a/src/plat/sdl2/main.rs b/src/plat/sdl2/main.rs
index 547ffa3..c78285c 100644
--- a/src/plat/sdl2/main.rs
+++ b/src/plat/sdl2/main.rs
@@ -51,7 +51,7 @@ fn main() {
     let input = Rc::new(RefCell::new(create_input()));
 
     let mut fps_counter = FpsCounter::default();
-    let mut gba: GameBoyAdvance<Sdl2Video, Sdl2AudioPlayer, Sdl2Input> = GameBoyAdvance::new(
+    let mut gba = GameBoyAdvance::new(
         cpu,
         bios_bin,
         cart,