diff --git a/imgui/src/clipboard.rs b/imgui/src/clipboard.rs
index 7be4043..09e721e 100644
--- a/imgui/src/clipboard.rs
+++ b/imgui/src/clipboard.rs
@@ -53,7 +53,7 @@ impl ClipboardBackend for DummyClipboardContext {
 }
 
 impl fmt::Debug for ClipboardContext {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("ClipboardContext")
             // beautiful code, no?
             .field("backend", &(&(*self.backend) as *const _))
diff --git a/imgui/src/context.rs b/imgui/src/context.rs
index 8139b3c..592ed88 100644
--- a/imgui/src/context.rs
+++ b/imgui/src/context.rs
@@ -502,7 +502,7 @@ impl Context {
     /// # Panics
     ///
     /// Panics if the context uses a shared font atlas that is already borrowed
-    pub fn fonts(&mut self) -> FontAtlasRefMut {
+    pub fn fonts(&mut self) -> FontAtlasRefMut<'_> {
         match self.shared_font_atlas {
             Some(ref font_atlas) => FontAtlasRefMut::Shared(font_atlas.borrow_mut()),
             None => unsafe {
@@ -518,7 +518,7 @@ impl Context {
     ///
     /// Panics if the context uses a shared font atlas that is already borrowed
     #[doc(alias = "NewFame")]
-    pub fn frame(&mut self) -> Ui {
+    pub fn frame(&mut self) -> Ui<'_> {
         // Clear default font if it no longer exists. This could be an error in the future
         let default_font = self.io().font_default;
         if !default_font.is_null() && self.fonts().get_font(FontId(default_font)).is_none() {
diff --git a/imgui/src/draw_list.rs b/imgui/src/draw_list.rs
index 296caa0..4ecf07c 100644
--- a/imgui/src/draw_list.rs
+++ b/imgui/src/draw_list.rs
@@ -174,7 +174,7 @@ impl<'ui> DrawListMut<'ui> {
     /// }
     /// ```
     #[doc(alias = "ChannelsSplit")]
-    pub fn channels_split<F: FnOnce(&ChannelsSplit)>(&self, channels_count: u32, f: F) {
+    pub fn channels_split<F: FnOnce(&ChannelsSplit<'_>)>(&self, channels_count: u32, f: F) {
         unsafe { sys::ImDrawList_ChannelsSplit(self.draw_list, channels_count as i32) };
         f(&ChannelsSplit {
             draw_list: self,
@@ -373,7 +373,7 @@ impl<'ui> DrawListMut<'ui> {
     ///         .build();
     /// }
     /// ```
-    pub fn add_image(&'ui self, texture_id: TextureId, p_min: [f32; 2], p_max: [f32; 2]) -> Image {
+    pub fn add_image(&'ui self, texture_id: TextureId, p_min: [f32; 2], p_max: [f32; 2]) -> Image<'_> {
         Image::new(self, texture_id, p_min, p_max)
     }
 
@@ -387,7 +387,7 @@ impl<'ui> DrawListMut<'ui> {
         p2: [f32; 2],
         p3: [f32; 2],
         p4: [f32; 2],
-    ) -> ImageQuad {
+    ) -> ImageQuad<'_> {
         ImageQuad::new(self, texture_id, p1, p2, p3, p4)
     }
 
@@ -398,7 +398,7 @@ impl<'ui> DrawListMut<'ui> {
         p_min: [f32; 2],
         p_max: [f32; 2],
         rounding: f32,
-    ) -> ImageRounded {
+    ) -> ImageRounded<'_> {
         ImageRounded::new(self, texture_id, p_min, p_max, rounding)
     }
 }
@@ -414,7 +414,7 @@ pub struct Line<'ui> {
 }
 
 impl<'ui> Line<'ui> {
-    fn new<C>(draw_list: &'ui DrawListMut, p1: [f32; 2], p2: [f32; 2], c: C) -> Self
+    fn new<C>(draw_list: &'ui DrawListMut<'_>, p1: [f32; 2], p2: [f32; 2], c: C) -> Self
     where
         C: Into<ImColor32>,
     {
@@ -461,7 +461,7 @@ pub struct Rect<'ui> {
 }
 
 impl<'ui> Rect<'ui> {
-    fn new<C>(draw_list: &'ui DrawListMut, p1: [f32; 2], p2: [f32; 2], c: C) -> Self
+    fn new<C>(draw_list: &'ui DrawListMut<'_>, p1: [f32; 2], p2: [f32; 2], c: C) -> Self
     where
         C: Into<ImColor32>,
     {
@@ -562,7 +562,7 @@ pub struct Triangle<'ui> {
 }
 
 impl<'ui> Triangle<'ui> {
-    fn new<C>(draw_list: &'ui DrawListMut, p1: [f32; 2], p2: [f32; 2], p3: [f32; 2], c: C) -> Self
+    fn new<C>(draw_list: &'ui DrawListMut<'_>, p1: [f32; 2], p2: [f32; 2], p3: [f32; 2], c: C) -> Self
     where
         C: Into<ImColor32>,
     {
@@ -630,7 +630,7 @@ pub struct Circle<'ui> {
 
 impl<'ui> Circle<'ui> {
     /// Typically constructed by [`DrawListMut::add_circle`]
-    pub fn new<C>(draw_list: &'ui DrawListMut, center: [f32; 2], radius: f32, color: C) -> Self
+    pub fn new<C>(draw_list: &'ui DrawListMut<'_>, center: [f32; 2], radius: f32, color: C) -> Self
     where
         C: Into<ImColor32>,
     {
@@ -708,7 +708,7 @@ pub struct BezierCurve<'ui> {
 impl<'ui> BezierCurve<'ui> {
     /// Typically constructed by [`DrawListMut::add_bezier_curve`]
     pub fn new<C>(
-        draw_list: &'ui DrawListMut,
+        draw_list: &'ui DrawListMut<'_>,
         pos0: [f32; 2],
         cp0: [f32; 2],
         cp1: [f32; 2],
@@ -776,7 +776,7 @@ pub struct Image<'ui> {
 impl<'ui> Image<'ui> {
     /// Typically constructed by [`DrawListMut::add_image`]
     pub fn new(
-        draw_list: &'ui DrawListMut,
+        draw_list: &'ui DrawListMut<'_>,
         texture_id: TextureId,
         p_min: [f32; 2],
         p_max: [f32; 2],
@@ -849,7 +849,7 @@ pub struct ImageQuad<'ui> {
 impl<'ui> ImageQuad<'ui> {
     /// Typically constructed by [`DrawListMut::add_image_quad`]
     pub fn new(
-        draw_list: &'ui DrawListMut,
+        draw_list: &'ui DrawListMut<'_>,
         texture_id: TextureId,
         p1: [f32; 2],
         p2: [f32; 2],
@@ -936,7 +936,7 @@ pub struct ImageRounded<'ui> {
 impl<'ui> ImageRounded<'ui> {
     /// Typically constructed by [`DrawListMut::add_image_rounded`]
     pub fn new(
-        draw_list: &'ui DrawListMut,
+        draw_list: &'ui DrawListMut<'_>,
         texture_id: TextureId,
         p_min: [f32; 2],
         p_max: [f32; 2],
diff --git a/imgui/src/fonts/atlas.rs b/imgui/src/fonts/atlas.rs
index 6f12e56..708b494 100644
--- a/imgui/src/fonts/atlas.rs
+++ b/imgui/src/fonts/atlas.rs
@@ -70,7 +70,7 @@ unsafe impl RawCast<sys::ImFontAtlas> for FontAtlas {}
 
 impl FontAtlas {
     #[doc(alias = "AddFontDefault", alias = "AddFont")]
-    pub fn add_font(&mut self, font_sources: &[FontSource]) -> FontId {
+    pub fn add_font(&mut self, font_sources: &[FontSource<'_>]) -> FontId {
         let (head, tail) = font_sources.split_first().unwrap();
         let font_id = self.add_font_internal(head, false);
         for font in tail {
@@ -78,7 +78,7 @@ impl FontAtlas {
         }
         font_id
     }
-    fn add_font_internal(&mut self, font_source: &FontSource, merge_mode: bool) -> FontId {
+    fn add_font_internal(&mut self, font_source: &FontSource<'_>, merge_mode: bool) -> FontId {
         let mut raw_config = sys_font_config_default();
         raw_config.MergeMode = merge_mode;
         let raw_font = match font_source {
@@ -141,7 +141,7 @@ impl FontAtlas {
     }
     /// Builds a 1 byte per-pixel font atlas texture
     #[doc(alias = "GetTextDataAsAlpha8")]
-    pub fn build_alpha8_texture(&mut self) -> FontAtlasTexture {
+    pub fn build_alpha8_texture(&mut self) -> FontAtlasTexture<'_> {
         let mut pixels: *mut c_uchar = ptr::null_mut();
         let mut width: c_int = 0;
         let mut height: c_int = 0;
@@ -175,7 +175,7 @@ impl FontAtlas {
     }
     /// Builds a 4 byte per-pixel font atlas texture
     #[doc(alias = "GetTextDataAsRGBA32")]
-    pub fn build_rgba32_texture(&mut self) -> FontAtlasTexture {
+    pub fn build_rgba32_texture(&mut self) -> FontAtlasTexture<'_> {
         let mut pixels: *mut c_uchar = ptr::null_mut();
         let mut width: c_int = 0;
         let mut height: c_int = 0;
diff --git a/imgui/src/input_widget.rs b/imgui/src/input_widget.rs
index 5143683..2658133 100644
--- a/imgui/src/input_widget.rs
+++ b/imgui/src/input_widget.rs
@@ -859,7 +859,7 @@ extern "C" fn callback<T: InputTextCallbackHandler>(
     let callback_data = unsafe {
         CallbackData {
             event_flag: InputTextFlags::from_bits((*data).EventFlag as u32).unwrap(),
-            user_data: &mut *((*data).UserData as *mut UserData<T>),
+            user_data: &mut *((*data).UserData as *mut UserData<'_, T>),
         }
     };
 
diff --git a/imgui/src/layout.rs b/imgui/src/layout.rs
index d3d5db5..f039b17 100644
--- a/imgui/src/layout.rs
+++ b/imgui/src/layout.rs
@@ -101,7 +101,7 @@ impl<'ui> Ui<'ui> {
     ///
     /// Returns a `GroupToken` that must be ended by calling `.end()`
     #[doc(alias = "BeginGroup")]
-    pub fn begin_group(&self) -> GroupToken {
+    pub fn begin_group(&self) -> GroupToken<'_> {
         unsafe { sys::igBeginGroup() };
         GroupToken::new(self)
     }
diff --git a/imgui/src/lib.rs b/imgui/src/lib.rs
index 333fd2e..7697fa2 100644
--- a/imgui/src/lib.rs
+++ b/imgui/src/lib.rs
@@ -1,4 +1,5 @@
 #![cfg_attr(test, allow(clippy::float_cmp))]
+#![deny(rust_2018_idioms)]
 pub extern crate imgui_sys as sys;
 
 use std::cell;
@@ -95,18 +96,12 @@ pub fn dear_imgui_version() -> &'static str {
     }
 }
 
-#[test]
-fn test_version() {
-    // TODO: what's the point of this test?
-    assert!(dear_imgui_version().starts_with("1."));
-}
-
 impl Context {
     /// Returns the global imgui-rs time.
     ///
     /// Incremented by Io::delta_time every frame.
     #[doc(alias = "GetTime")]
-    pub fn time(&self, input: f64) -> f64 {
+    pub fn time(&self) -> f64 {
         unsafe { sys::igGetTime() }
     }
     /// Returns the global imgui-rs frame count.
@@ -171,8 +166,9 @@ impl<'ui> Ui<'ui> {
     pub fn io(&self) -> &Io {
         unsafe { &*(sys::igGetIO() as *const Io) }
     }
+
     /// Returns an immutable reference to the font atlas
-    pub fn fonts(&self) -> FontAtlasRef {
+    pub fn fonts(&self) -> FontAtlasRef<'_> {
         match self.font_atlas {
             Some(ref font_atlas) => FontAtlasRef::Shared(font_atlas),
             None => unsafe {
diff --git a/imgui/src/render/draw_data.rs b/imgui/src/render/draw_data.rs
index d7b3c2f..0bd3e49 100644
--- a/imgui/src/render/draw_data.rs
+++ b/imgui/src/render/draw_data.rs
@@ -37,7 +37,7 @@ unsafe impl RawCast<sys::ImDrawData> for DrawData {}
 impl DrawData {
     /// Returns an iterator over the draw lists included in the draw data.
     #[inline]
-    pub fn draw_lists(&self) -> DrawListIterator {
+    pub fn draw_lists(&self) -> DrawListIterator<'_> {
         unsafe {
             DrawListIterator {
                 iter: self.cmd_lists().iter(),
@@ -181,7 +181,7 @@ impl DrawList {
     }
 
     #[inline]
-    pub fn commands(&self) -> DrawCmdIterator {
+    pub fn commands(&self) -> DrawCmdIterator<'_> {
         unsafe {
             DrawCmdIterator {
                 iter: self.cmd_buffer().iter(),
diff --git a/imgui/src/stacks.rs b/imgui/src/stacks.rs
index 11bebe6..37fdced 100644
--- a/imgui/src/stacks.rs
+++ b/imgui/src/stacks.rs
@@ -59,7 +59,7 @@ impl<'ui> Ui<'ui> {
     /// color.pop();
     /// ```
     #[doc(alias = "PushStyleColorVec4")]
-    pub fn push_style_color(&self, style_color: StyleColor, color: [f32; 4]) -> ColorStackToken {
+    pub fn push_style_color(&self, style_color: StyleColor, color: [f32; 4]) -> ColorStackToken<'_> {
         unsafe { sys::igPushStyleColor_Vec4(style_color as i32, color.into()) };
         ColorStackToken::new(self)
     }
@@ -115,7 +115,7 @@ impl<'ui> Ui<'ui> {
     /// style.pop();
     /// ```
     #[doc(alias = "PushStyleVar")]
-    pub fn push_style_var(&self, style_var: StyleVar) -> StyleStackToken {
+    pub fn push_style_var(&self, style_var: StyleVar) -> StyleStackToken<'_> {
         unsafe { push_style_var(style_var) };
         StyleStackToken::new(self)
     }
@@ -196,7 +196,7 @@ pub struct MultiColorStackToken {
 impl MultiColorStackToken {
     /// Pops changes from the color stack
     #[doc(alias = "PopStyleColor")]
-    pub fn pop(mut self, _: &Ui) {
+    pub fn pop(mut self, _: &Ui<'_>) {
         self.ctx = ptr::null();
         unsafe { sys::igPopStyleColor(self.count as i32) };
     }
@@ -236,7 +236,7 @@ pub struct MultiStyleStackToken {
 impl MultiStyleStackToken {
     /// Pops changes from the style stack
     #[doc(alias = "PopStyleVar")]
-    pub fn pop(mut self, _: &Ui) {
+    pub fn pop(mut self, _: &Ui<'_>) {
         self.ctx = ptr::null();
         unsafe { sys::igPopStyleVar(self.count as i32) };
     }
@@ -380,7 +380,7 @@ pub struct ItemWidthStackToken {
 impl ItemWidthStackToken {
     /// Pops a change from the item width stack
     #[doc(alias = "PopItemWidth")]
-    pub fn pop(mut self, _: &Ui) {
+    pub fn pop(mut self, _: &Ui<'_>) {
         self._ctx = ptr::null();
         unsafe { sys::igPopItemWidth() };
     }
@@ -394,7 +394,7 @@ pub struct TextWrapPosStackToken {
 impl TextWrapPosStackToken {
     /// Pops a change from the text wrap position stack
     #[doc(alias = "PopTextWrapPos")]
-    pub fn pop(mut self, _: &Ui) {
+    pub fn pop(mut self, _: &Ui<'_>) {
         self._ctx = ptr::null();
         unsafe { sys::igPopTextWrapPos() };
     }
@@ -410,7 +410,7 @@ impl ItemFlagsStackToken {
     /// Pops a change from the item flags stack
 
     #[doc(alias = "PopAllowKeyboardFocus", alias = "PopButtonRepeat")]
-    pub fn pop(mut self, _: &Ui) {
+    pub fn pop(mut self, _: &Ui<'_>) {
         self._ctx = ptr::null();
         const ALLOW_KEYBOARD_FOCUS: ItemFlag = ItemFlag::AllowKeyboardFocus(true);
         const BUTTON_REPEAT: ItemFlag = ItemFlag::ButtonRepeat(true);
diff --git a/imgui/src/string.rs b/imgui/src/string.rs
index 1ba181b..d124d85 100644
--- a/imgui/src/string.rs
+++ b/imgui/src/string.rs
@@ -305,14 +305,14 @@ impl Index<RangeFull> for ImString {
 
 impl fmt::Debug for ImString {
     #[inline]
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Debug::fmt(self.to_str(), f)
     }
 }
 
 impl fmt::Display for ImString {
     #[inline]
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(self.to_str(), f)
     }
 }
@@ -359,14 +359,14 @@ impl<'a> Default for &'a ImStr {
 
 impl fmt::Debug for ImStr {
     #[inline]
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Debug::fmt(&self.0, f)
     }
 }
 
 impl fmt::Display for ImStr {
     #[inline]
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(self.to_str(), f)
     }
 }
diff --git a/imgui/src/widget/color_editors.rs b/imgui/src/widget/color_editors.rs
index 1d8949a..0790634 100644
--- a/imgui/src/widget/color_editors.rs
+++ b/imgui/src/widget/color_editors.rs
@@ -318,7 +318,7 @@ impl<'a, T: AsRef<str> + 'a> ColorEdit<'a, T> {
     /// Builds the color editor.
     ///
     /// Returns true if the color value was changed.
-    pub fn build(mut self, ui: &Ui) -> bool {
+    pub fn build(mut self, ui: &Ui<'_>) -> bool {
         if let EditableColor::Float3(_) = self.value {
             self.flags.insert(ColorEditFlags::NO_ALPHA);
         }
@@ -506,7 +506,7 @@ impl<'a, T: AsRef<str>> ColorPicker<'a, T> {
     /// Builds the color picker.
     ///
     /// Returns true if the color value was changed.
-    pub fn build(mut self, ui: &Ui) -> bool {
+    pub fn build(mut self, ui: &Ui<'_>) -> bool {
         if let EditableColor::Float3(_) = self.value {
             self.flags.insert(ColorEditFlags::NO_ALPHA);
         }
@@ -621,7 +621,7 @@ impl<T: AsRef<str>> ColorButton<T> {
     /// Builds the color button.
     ///
     /// Returns true if this color button was clicked.
-    pub fn build(self, ui: &Ui) -> bool {
+    pub fn build(self, ui: &Ui<'_>) -> bool {
         unsafe {
             sys::igColorButton(
                 ui.scratch_txt(self.desc_id),
diff --git a/imgui/src/widget/combo_box.rs b/imgui/src/widget/combo_box.rs
index 557ccf3..342ef69 100644
--- a/imgui/src/widget/combo_box.rs
+++ b/imgui/src/widget/combo_box.rs
@@ -162,7 +162,7 @@ impl<T: AsRef<str>, Preview: AsRef<str>> ComboBox<T, Preview> {
     /// Returns the result of the closure, if it is called.
     ///
     /// Note: the closure is not called if the combo box is not open.
-    pub fn build<R, F: FnOnce() -> R>(self, ui: &Ui, f: F) -> Option<R> {
+    pub fn build<R, F: FnOnce() -> R>(self, ui: &Ui<'_>, f: F) -> Option<R> {
         self.begin(ui).map(|_combo| f())
     }
 }
diff --git a/imgui/src/widget/drag.rs b/imgui/src/widget/drag.rs
index 6f9c531..a861365 100644
--- a/imgui/src/widget/drag.rs
+++ b/imgui/src/widget/drag.rs
@@ -66,7 +66,7 @@ impl<L: AsRef<str>, T: DataTypeKind, F: AsRef<str>> Drag<T, L, F> {
     /// Builds a drag slider that is bound to the given value.
     ///
     /// Returns true if the slider value was changed.
-    pub fn build(self, ui: &Ui, value: &mut T) -> bool {
+    pub fn build(self, ui: &Ui<'_>, value: &mut T) -> bool {
         unsafe {
             let (one, two) = ui.scratch_txt_with_opt(self.label, self.display_format);
 
@@ -91,7 +91,7 @@ impl<L: AsRef<str>, T: DataTypeKind, F: AsRef<str>> Drag<T, L, F> {
     /// Builds a horizontal array of multiple drag sliders attached to the given slice.
     ///
     /// Returns true if any slider value was changed.
-    pub fn build_array(self, ui: &Ui, values: &mut [T]) -> bool {
+    pub fn build_array(self, ui: &Ui<'_>, values: &mut [T]) -> bool {
         unsafe {
             let (one, two) = ui.scratch_txt_with_opt(self.label, self.display_format);
 
@@ -208,7 +208,7 @@ where
     ///
     /// Returns true if the slider value was changed.
     #[doc(alias = "DragFloatRange2")]
-    pub fn build(self, ui: &Ui, min: &mut f32, max: &mut f32) -> bool {
+    pub fn build(self, ui: &Ui<'_>, min: &mut f32, max: &mut f32) -> bool {
         let label;
         let mut display_format = std::ptr::null();
         let mut max_display_format = std::ptr::null();
@@ -251,7 +251,7 @@ where
     ///
     /// Returns true if the slider value was changed.
     #[doc(alias = "DragIntRange2")]
-    pub fn build(self, ui: &Ui, min: &mut i32, max: &mut i32) -> bool {
+    pub fn build(self, ui: &Ui<'_>, min: &mut i32, max: &mut i32) -> bool {
         unsafe {
             let label;
             let mut display_format = std::ptr::null();
diff --git a/imgui/src/widget/image.rs b/imgui/src/widget/image.rs
index 566f00c..dd4c58b 100644
--- a/imgui/src/widget/image.rs
+++ b/imgui/src/widget/image.rs
@@ -55,7 +55,7 @@ impl Image {
         self
     }
     /// Builds the image
-    pub fn build(self, _: &Ui) {
+    pub fn build(self, _: &Ui<'_>) {
         unsafe {
             sys::igImage(
                 self.texture_id.id() as *mut c_void,
@@ -131,7 +131,7 @@ impl ImageButton {
         self
     }
     /// Builds the image button
-    pub fn build(self, _: &Ui) -> bool {
+    pub fn build(self, _: &Ui<'_>) -> bool {
         unsafe {
             sys::igImageButton(
                 self.texture_id.id() as *mut c_void,
diff --git a/imgui/src/widget/list_box.rs b/imgui/src/widget/list_box.rs
index 70fbce5..0485e6d 100644
--- a/imgui/src/widget/list_box.rs
+++ b/imgui/src/widget/list_box.rs
@@ -70,7 +70,7 @@ impl<T: AsRef<str>> ListBox<T> {
     /// Builds a simple list box for choosing from a slice of values
     pub fn build_simple<V, L>(
         self,
-        ui: &Ui,
+        ui: &Ui<'_>,
         current_item: &mut usize,
         items: &[V],
         label_fn: &L,
diff --git a/imgui/src/widget/menu.rs b/imgui/src/widget/menu.rs
index 8404263..0ac02e5 100644
--- a/imgui/src/widget/menu.rs
+++ b/imgui/src/widget/menu.rs
@@ -167,7 +167,7 @@ impl<Label: AsRef<str>, Shortcut: AsRef<str>> MenuItem<Label, Shortcut> {
     ///
     /// Returns true if the menu item is activated.
     #[doc(alias = "MenuItemBool")]
-    pub fn build(self, ui: &Ui) -> bool {
+    pub fn build(self, ui: &Ui<'_>) -> bool {
         unsafe {
             let (label, shortcut) = ui.scratch_txt_with_opt(self.label, self.shortcut);
             sys::igMenuItem_Bool(label, shortcut, self.selected, self.enabled)
@@ -176,7 +176,7 @@ impl<Label: AsRef<str>, Shortcut: AsRef<str>> MenuItem<Label, Shortcut> {
 
     #[doc(alias = "MenuItemBool")]
     /// Builds the menu item using a mutable reference to selected state.
-    pub fn build_with_ref(self, ui: &Ui, selected: &mut bool) -> bool {
+    pub fn build_with_ref(self, ui: &Ui<'_>, selected: &mut bool) -> bool {
         if self.selected(*selected).build(ui) {
             *selected = !*selected;
             true
diff --git a/imgui/src/widget/progress_bar.rs b/imgui/src/widget/progress_bar.rs
index 7995d9d..dd6cba2 100644
--- a/imgui/src/widget/progress_bar.rs
+++ b/imgui/src/widget/progress_bar.rs
@@ -61,7 +61,7 @@ impl<T: AsRef<str>> ProgressBar<T> {
     }
 
     /// Builds the progress bar
-    pub fn build(self, ui: &Ui) {
+    pub fn build(self, ui: &Ui<'_>) {
         unsafe {
             sys::igProgressBar(
                 self.fraction,
diff --git a/imgui/src/widget/selectable.rs b/imgui/src/widget/selectable.rs
index 0d2ae82..ef0c172 100644
--- a/imgui/src/widget/selectable.rs
+++ b/imgui/src/widget/selectable.rs
@@ -107,7 +107,7 @@ impl<T: AsRef<str>> Selectable<T> {
     /// Builds the selectable.
     ///
     /// Returns true if the selectable was clicked.
-    pub fn build(self, ui: &Ui) -> bool {
+    pub fn build(self, ui: &Ui<'_>) -> bool {
         unsafe {
             sys::igSelectable_Bool(
                 ui.scratch_txt(self.label),
@@ -119,7 +119,7 @@ impl<T: AsRef<str>> Selectable<T> {
     }
 
     /// Builds the selectable using a mutable reference to selected state.
-    pub fn build_with_ref(self, ui: &Ui, selected: &mut bool) -> bool {
+    pub fn build_with_ref(self, ui: &Ui<'_>, selected: &mut bool) -> bool {
         if self.selected(*selected).build(ui) {
             *selected = !*selected;
             true
diff --git a/imgui/src/widget/slider.rs b/imgui/src/widget/slider.rs
index d245046..231dd6b 100644
--- a/imgui/src/widget/slider.rs
+++ b/imgui/src/widget/slider.rs
@@ -95,7 +95,7 @@ where
     /// Builds a slider that is bound to the given value.
     ///
     /// Returns true if the slider value was changed.
-    pub fn build(self, ui: &Ui, value: &mut Data) -> bool {
+    pub fn build(self, ui: &Ui<'_>, value: &mut Data) -> bool {
         unsafe {
             let (label, display_format) = ui.scratch_txt_with_opt(self.label, self.display_format);
 
@@ -113,7 +113,7 @@ where
     /// Builds a horizontal array of multiple sliders attached to the given slice.
     ///
     /// Returns true if any slider value was changed.
-    pub fn build_array(self, ui: &Ui, values: &mut [Data]) -> bool {
+    pub fn build_array(self, ui: &Ui<'_>, values: &mut [Data]) -> bool {
         unsafe {
             let (label, display_format) = ui.scratch_txt_with_opt(self.label, self.display_format);
 
@@ -221,7 +221,7 @@ where
     /// Builds a vertical slider that is bound to the given value.
     ///
     /// Returns true if the slider value was changed.
-    pub fn build(self, ui: &Ui, value: &mut Data) -> bool {
+    pub fn build(self, ui: &Ui<'_>, value: &mut Data) -> bool {
         unsafe {
             let (label, display_format) = ui.scratch_txt_with_opt(self.label, self.display_format);
 
@@ -325,7 +325,7 @@ where
     /// Builds an angle slider that is bound to the given value (in radians).
     ///
     /// Returns true if the slider value was changed.
-    pub fn build(self, ui: &Ui, value_rad: &mut f32) -> bool {
+    pub fn build(self, ui: &Ui<'_>, value_rad: &mut f32) -> bool {
         unsafe {
             let (label, display_format) = ui.scratch_txt_two(self.label, self.display_format);
 
diff --git a/imgui/src/widget/tree.rs b/imgui/src/widget/tree.rs
index 7421d03..06abafc 100644
--- a/imgui/src/widget/tree.rs
+++ b/imgui/src/widget/tree.rs
@@ -408,7 +408,7 @@ impl<T: AsRef<str>> CollapsingHeader<T> {
     ///
     /// This is the same as [build](Self::build) but is provided for consistent naming.
     #[must_use]
-    pub fn begin(self, ui: &Ui) -> bool {
+    pub fn begin(self, ui: &Ui<'_>) -> bool {
         self.build(ui)
     }
 
@@ -419,7 +419,7 @@ impl<T: AsRef<str>> CollapsingHeader<T> {
     /// This is the same as [build_with_close_button](Self::build_with_close_button)
     /// but is provided for consistent naming.
     #[must_use]
-    pub fn begin_with_close_button(self, ui: &Ui, opened: &mut bool) -> bool {
+    pub fn begin_with_close_button(self, ui: &Ui<'_>, opened: &mut bool) -> bool {
         self.build_with_close_button(ui, opened)
     }
 
@@ -428,7 +428,7 @@ impl<T: AsRef<str>> CollapsingHeader<T> {
     /// Returns true if the collapsing header is open and content should be rendered.
     #[must_use]
     #[inline]
-    pub fn build(self, ui: &Ui) -> bool {
+    pub fn build(self, ui: &Ui<'_>) -> bool {
         unsafe {
             sys::igCollapsingHeader_TreeNodeFlags(
                 ui.scratch_txt(self.label),
@@ -442,7 +442,7 @@ impl<T: AsRef<str>> CollapsingHeader<T> {
     /// Returns true if the collapsing header is open and content should be rendered.
     #[must_use]
     #[inline]
-    pub fn build_with_close_button(self, ui: &Ui, opened: &mut bool) -> bool {
+    pub fn build_with_close_button(self, ui: &Ui<'_>, opened: &mut bool) -> bool {
         unsafe {
             sys::igCollapsingHeader_BoolPtr(
                 ui.scratch_txt(self.label),