diff --git a/src/main.rs b/src/main.rs
index 77dd769..4993cfb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -16,13 +16,14 @@ fn main() -> Result<(), Error>  {
         .downcast::<gst::Pipeline>()
         .expect("Expected a gst::Pipeline");
 
-    let text_src = gst::ElementFactory::make("appsrc", Some("text-src")).unwrap();
-    text_src.set_property("is-live", true);
-    text_src.set_property("caps",
+    let text_src = gst::ElementFactory::make("appsrc", Some("text-src")).unwrap().downcast::<gst_app::AppSrc>().unwrap();
+    text_src.set_is_live(true);
+    text_src.set_format(gst::Format::Time);
+    text_src.set_caps(Some(
         &gst::Caps::builder("text/x-raw")
         .field("format", "utf8")
         .build(),
-    );
+    ));
     pipeline.add(&text_src).expect("Failed to add elements to pipeline");
 
     let converter = pipeline.by_name("converter").unwrap();