diff --git a/Gir_GstApp.toml b/Gir_GstApp.toml
index 45f0a501e..e8d1aa564 100644
--- a/Gir_GstApp.toml
+++ b/Gir_GstApp.toml
@@ -67,6 +67,10 @@ final_type = true
     # Use Result<FlowSuccess, FlowError>
     ignore = true
 
+    [[object.signal]]
+    name = "eos"
+    concurrency = "send"
+
     [[object.function]]
     name = "set_caps"
         [[object.function.parameter]]
diff --git a/gstreamer-app/src/app_sink.rs b/gstreamer-app/src/app_sink.rs
index 151dcab33..42c5a36d2 100644
--- a/gstreamer-app/src/app_sink.rs
+++ b/gstreamer-app/src/app_sink.rs
@@ -59,7 +59,7 @@ pub struct AppSinkCallbacksBuilder {
 }
 
 impl AppSinkCallbacksBuilder {
-    pub fn eos<F: Fn(&AppSink) + Send + Sync + 'static>(self, eos: F) -> Self {
+    pub fn eos<F: Fn(&AppSink) + Send + 'static>(self, eos: F) -> Self {
         Self {
             eos: Some(RefCell::new(Box::new(eos))),
             ..self
@@ -67,7 +67,7 @@ impl AppSinkCallbacksBuilder {
     }
 
     pub fn new_preroll<
-        F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + Sync + 'static,
+        F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + 'static,
     >(
         self,
         new_preroll: F,
@@ -79,7 +79,7 @@ impl AppSinkCallbacksBuilder {
     }
 
     pub fn new_sample<
-        F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + Sync + 'static,
+        F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + 'static,
     >(
         self,
         new_sample: F,
@@ -177,7 +177,7 @@ impl AppSink {
     }
 
     pub fn connect_new_sample<
-        F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + Sync + 'static,
+        F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + 'static,
     >(
         &self,
         f: F,
@@ -194,7 +194,7 @@ impl AppSink {
     }
 
     pub fn connect_new_preroll<
-        F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + Sync + 'static,
+        F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + 'static,
     >(
         &self,
         f: F,
@@ -212,7 +212,7 @@ impl AppSink {
 }
 
 unsafe extern "C" fn new_sample_trampoline<
-    F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + Sync + 'static,
+    F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + 'static,
 >(
     this: *mut gst_app_sys::GstAppSink,
     f: glib_sys::gpointer,
@@ -223,7 +223,7 @@ unsafe extern "C" fn new_sample_trampoline<
 }
 
 unsafe extern "C" fn new_preroll_trampoline<
-    F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + Sync + 'static,
+    F: Fn(&AppSink) -> Result<gst::FlowSuccess, gst::FlowError> + Send + 'static,
 >(
     this: *mut gst_app_sys::GstAppSink,
     f: glib_sys::gpointer,
diff --git a/gstreamer-app/src/auto/app_sink.rs b/gstreamer-app/src/auto/app_sink.rs
index 8d30cc93f..821fb3a1f 100644
--- a/gstreamer-app/src/auto/app_sink.rs
+++ b/gstreamer-app/src/auto/app_sink.rs
@@ -157,7 +157,7 @@ impl AppSink {
         }
     }
 
-    pub fn connect_eos<F: Fn(&AppSink) + Send + Sync + 'static>(&self, f: F) -> SignalHandlerId {
+    pub fn connect_eos<F: Fn(&AppSink) + Send + 'static>(&self, f: F) -> SignalHandlerId {
         unsafe {
             let f: Box_<F> = Box_::new(f);
             connect_raw(self.as_ptr() as *mut _, b"eos\0".as_ptr() as *const _,
@@ -225,7 +225,7 @@ impl AppSink {
 unsafe impl Send for AppSink {}
 unsafe impl Sync for AppSink {}
 
-unsafe extern "C" fn eos_trampoline<F: Fn(&AppSink) + Send + Sync + 'static>(this: *mut gst_app_sys::GstAppSink, f: glib_sys::gpointer) {
+unsafe extern "C" fn eos_trampoline<F: Fn(&AppSink) + Send + 'static>(this: *mut gst_app_sys::GstAppSink, f: glib_sys::gpointer) {
     let f: &F = &*(f as *const F);
     f(&from_glib_borrow(this))
 }