diff --git a/rynk/rynk-wasm/index.html b/rynk/rynk-wasm/index.html
index 41524fd6e..00103c5c2 100644
--- a/rynk/rynk-wasm/index.html
+++ b/rynk/rynk-wasm/index.html
@@ -165,7 +165,9 @@ <h1>Rynk web demo</h1>
           // Release locks so a failed attempt can be retried.
           async close() {
             try { await reader.cancel(); } catch {}
+            reader.releaseLock();
             try { await writer.abort(); } catch {}
+            writer.releaseLock();
             try { await port.close(); } catch {}
           },
         };