diff --git a/gstreamer-video/src/video_overlay_composition.rs b/gstreamer-video/src/video_overlay_composition.rs
index 691e71b7a..e1e7a0697 100644
--- a/gstreamer-video/src/video_overlay_composition.rs
+++ b/gstreamer-video/src/video_overlay_composition.rs
@@ -214,8 +214,8 @@ impl fmt::Debug for VideoOverlayCompositionRef {
 
 impl VideoOverlayComposition {
     #[doc(alias = "gst_video_overlay_composition_new")]
-    pub fn new<'a, T: IntoIterator<Item = &'a VideoOverlayRectangle>>(
-        rects: T,
+    pub fn new<'a>(
+        rects: impl IntoIterator<Item = &'a VideoOverlayRectangle>,
     ) -> Result<Self, glib::error::BoolError> {
         assert_initialized_main_thread!();
         unsafe {
diff --git a/gstreamer/src/caps.rs b/gstreamer/src/caps.rs
index d0d891623..f15c11f10 100644
--- a/gstreamer/src/caps.rs
+++ b/gstreamer/src/caps.rs
@@ -58,10 +58,7 @@ impl Caps {
     }
 
     #[allow(clippy::should_implement_trait)]
-    pub fn from_iter<'a, I>(iter: I) -> Self
-    where
-        I: IntoIterator<Item = &'a StructureRef>,
-    {
+    pub fn from_iter<'a>(iter: impl IntoIterator<Item = &'a StructureRef>) -> Self {
         assert_initialized_main_thread!();
         let mut caps = Caps::new_empty();
 
@@ -71,10 +68,9 @@ impl Caps {
         caps
     }
 
-    pub fn from_iter_with_features<'a, 'b, I>(iter: I) -> Self
-    where
-        I: IntoIterator<Item = (&'a StructureRef, &'b CapsFeaturesRef)>,
-    {
+    pub fn from_iter_with_features<'a, 'b>(
+        iter: impl IntoIterator<Item = (&'a StructureRef, &'b CapsFeaturesRef)>,
+    ) -> Self {
         assert_initialized_main_thread!();
         let mut caps = Caps::new_empty();
 
diff --git a/gstreamer/src/date_time.rs b/gstreamer/src/date_time.rs
index d94c5d7b2..513eb7435 100644
--- a/gstreamer/src/date_time.rs
+++ b/gstreamer/src/date_time.rs
@@ -109,22 +109,14 @@ fn validate(
 
 impl DateTime {
     #[doc(alias = "gst_date_time_new")]
-    pub fn new<
-        TZ: Into<Option<f32>>,
-        Y: Into<i32>,
-        MO: Into<Option<i32>>,
-        D: Into<Option<i32>>,
-        H: Into<Option<i32>>,
-        MI: Into<Option<i32>>,
-        S: Into<Option<f64>>,
-    >(
-        tzoffset: TZ,
-        year: Y,
-        month: MO,
-        day: D,
-        hour: H,
-        minute: MI,
-        seconds: S,
+    pub fn new(
+        tzoffset: impl Into<Option<f32>>,
+        year: impl Into<i32>,
+        month: impl Into<Option<i32>>,
+        day: impl Into<Option<i32>>,
+        hour: impl Into<Option<i32>>,
+        minute: impl Into<Option<i32>>,
+        seconds: impl Into<Option<f64>>,
     ) -> Result<DateTime, glib::BoolError> {
         assert_initialized_main_thread!();
 
@@ -153,20 +145,13 @@ impl DateTime {
     }
 
     #[doc(alias = "gst_date_time_new_local_time")]
-    pub fn new_local_time<
-        Y: Into<i32>,
-        MO: Into<Option<i32>>,
-        D: Into<Option<i32>>,
-        H: Into<Option<i32>>,
-        MI: Into<Option<i32>>,
-        S: Into<Option<f64>>,
-    >(
-        year: Y,
-        month: MO,
-        day: D,
-        hour: H,
-        minute: MI,
-        seconds: S,
+    pub fn new_local_time(
+        year: impl Into<i32>,
+        month: impl Into<Option<i32>>,
+        day: impl Into<Option<i32>>,
+        hour: impl Into<Option<i32>>,
+        minute: impl Into<Option<i32>>,
+        seconds: impl Into<Option<f64>>,
     ) -> Result<DateTime, glib::BoolError> {
         assert_initialized_main_thread!();
 
diff --git a/gstreamer/src/structure.rs b/gstreamer/src/structure.rs
index 51680523f..1008e32b9 100644
--- a/gstreamer/src/structure.rs
+++ b/gstreamer/src/structure.rs
@@ -100,10 +100,10 @@ impl Structure {
     }
 
     #[allow(clippy::should_implement_trait)]
-    pub fn from_iter<'a, 'b, I>(name: &str, iter: I) -> Structure
-    where
-        I: IntoIterator<Item = (&'a str, &'b SendValue)>,
-    {
+    pub fn from_iter<'a, 'b>(
+        name: &str,
+        iter: impl IntoIterator<Item = (&'a str, &'b SendValue)>,
+    ) -> Structure {
         assert_initialized_main_thread!();
         let mut structure = Structure::new_empty(name);