diff --git a/doppler/Cargo.toml b/doppler/Cargo.toml
index f5d5078..541c2fc 100644
--- a/doppler/Cargo.toml
+++ b/doppler/Cargo.toml
@@ -6,18 +6,18 @@ edition = "2018"
 
 [dependencies]
 gl = "0.14.0"
-imgui={version="0.4.0", optional=true}
-imgui-winit-support = {version="0.4.0", optional=true}
-imgui-opengl-renderer = {version="0.8", optional = true}
+imgui={version="0.6.1", optional=true}
+imgui-winit-support = {version="0.6.1", optional=true}
+imgui-opengl-renderer = {version="0.10.0", optional = true}
 cgmath = {version="0.17.0", features=["serde"]}
-imgui-inspect = {version="0.5.0", optional = true}
-imgui-inspect-derive = {version="0.5.0", optional= true}
+imgui-inspect = {version="0.7.0", optional = true}
+imgui-inspect-derive = {version="0.7.0", optional= true}
 tobj = "2.0.2"
 inline_tweak = "1.0.8"
 log = "0.4.11"
 simple-logging = "2.0.2"
 image2 = { git = "https://github.com/Leinnan/image2-rs", branch="legacy", default-features = false, features=["io"] }
-glutin = "0.24.1"
+glutin = "0.26.0"
 serde = { version = "1.0.117", features = ["derive"] }
 serde_json = "1.0.59"
 
diff --git a/doppler/src/engine.rs b/doppler/src/engine.rs
index db8d778..f2c041d 100644
--- a/doppler/src/engine.rs
+++ b/doppler/src/engine.rs
@@ -102,6 +102,7 @@ impl Engine {
             .with_resizable(true);
 
         let gl_window = glutin::ContextBuilder::new()
+            .with_gl_profile(glutin::GlProfile::Core)
             .build_windowed(window, &event_loop)
             .unwrap();
 
@@ -227,7 +228,9 @@ impl Engine {
                     // other application-specific logic
                     #[cfg(feature = "imgui_inspect")]
                     {
-                        last_frame = imgui.io_mut().update_delta_time(last_frame);
+                        let now = Instant::now();
+                        imgui.io_mut().update_delta_time(now - last_frame);
+                        last_frame = now;
                     }
                 }
                 Event::MainEventsCleared => {
diff --git a/doppler/src/imgui_helper.rs b/doppler/src/imgui_helper.rs
index 82dea8d..52e2d01 100644
--- a/doppler/src/imgui_helper.rs
+++ b/doppler/src/imgui_helper.rs
@@ -31,7 +31,7 @@ impl InspectRenderDefault<Vector3<f32>> for CgmathVec3f32 {
         let mut change = false;
         for el in data.iter_mut() {
             let mut array: [f32; 3] = [el.x, el.y, el.z];
-            change |= ui.drag_float3(&label_im, &mut array).build();
+            change |= ui.input_float3(&label_im, &mut array).build();
             el.x = array[0];
             el.y = array[1];
             el.z = array[2];
@@ -66,7 +66,7 @@ impl InspectRenderDefault<Point3<f32>> for CgmathPoint3f32 {
         let mut change = false;
         for el in data.iter_mut() {
             let mut array: [f32; 3] = [el.x, el.y, el.z];
-            change |= ui.drag_float3(&label_im, &mut array).build();
+            change |= ui.input_float3(&label_im, &mut array).build();
             el.x = array[0];
             el.y = array[1];
             el.z = array[2];
diff --git a/doppler/src/mesh.rs b/doppler/src/mesh.rs
index 65493b0..da3e62e 100644
--- a/doppler/src/mesh.rs
+++ b/doppler/src/mesh.rs
@@ -16,7 +16,7 @@ use crate::shader::Shader;
 // Depending on how you pass the data to OpenGL, this may be bad. In this case it's not strictly
 // necessary though because of the `offset!` macro used below in setupMesh()
 #[repr(C)]
-#[derive(Clone)]
+#[derive(Clone,Debug)]
 pub struct Vertex {
     // position
     pub position: Vector3<f32>,
@@ -42,7 +42,7 @@ impl Default for Vertex {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone,Debug)]
 pub struct Texture {
     pub id: u32,
     pub type_: String,
@@ -57,7 +57,7 @@ impl Drop for Texture {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone,Debug)]
 pub struct Mesh {
     /*  Mesh Data  */
     pub vertices: Vec<Vertex>,
diff --git a/doppler/src/model.rs b/doppler/src/model.rs
index 558ad3e..d026540 100644
--- a/doppler/src/model.rs
+++ b/doppler/src/model.rs
@@ -9,7 +9,7 @@ use log::{info, warn};
 use std::path::Path;
 use tobj;
 
-#[derive(Clone)]
+#[derive(Clone,Debug)]
 pub struct Model {
     /*  Model Data */
     pub meshes: Vec<Mesh>,
diff --git a/src/example_client.rs b/src/example_client.rs
index 49f1d1e..cc38cd8 100644
--- a/src/example_client.rs
+++ b/src/example_client.rs
@@ -210,7 +210,8 @@ impl Client for ExampleClient {
                     .size([250.0, 250.0], Condition::FirstUseEver)
                     .opened(&mut show_window)
                     .build(&ui, || {
-                        ui.drag_int(im_str!("id"), &mut id).min(0).max(max).build();
+                        ui.input_int(im_str!("id"), &mut id).build();
+                        id = if id < 0 { 0 } else if id > max { max } else { id };
 
                         let mut selected_mut = vec![&mut self.models[id as usize].transform];
                         <Transform as imgui_inspect::InspectRenderStruct<Transform>>::render_mut(
@@ -244,10 +245,9 @@ impl Client for ExampleClient {
                         );
                     }
                     ui.separator();
-                    ui.drag_int(im_str!("Light ID"), &mut id)
-                        .min(0)
-                        .max(max)
+                    ui.input_int(im_str!("Light ID"), &mut id)
                         .build();
+                    id = if id < 0 { 0 } else if id > max { max } else { id };
                     {
                         let mut selected_mut =
                             vec![&mut self.lighting_system.point_lights[id as usize]];