diff --git a/CHANGELOG.md b/CHANGELOG.md
index 630235f9..9311f0bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+**Fixes**:
+
+- Envelopes will be discarded rather than blocking if the transport channel fills up. ([#546](https://github.com/getsentry/sentry-rust/pull/546))
+
 ## 0.29.2
 
 ### Various fixes & improvements
diff --git a/sentry/src/transports/tokio_thread.rs b/sentry/src/transports/tokio_thread.rs
index 4a99a7a3..5ea1ae5e 100644
--- a/sentry/src/transports/tokio_thread.rs
+++ b/sentry/src/transports/tokio_thread.rs
@@ -85,7 +85,12 @@ impl TransportThread {
     }
 
     pub fn send(&self, envelope: Envelope) {
-        let _ = self.sender.send(Task::SendEnvelope(envelope));
+        // Using send here would mean that when the channel fills up for whatever
+        // reason, trying to send an envelope would block everything. We'd rather
+        // drop the envelope in that case.
+        if let Err(e) = self.sender.try_send(Task::SendEnvelope(envelope)) {
+            sentry_debug!("envelope dropped: {e}");
+        }
     }
 
     pub fn flush(&self, timeout: Duration) -> bool {