diff --git a/extensions/ipynb/esbuild.js b/extensions/ipynb/esbuild.js
index 4128889bf76..28000f1ebf9 100644
--- a/extensions/ipynb/esbuild.js
+++ b/extensions/ipynb/esbuild.js
@@ -41,7 +41,11 @@ build().catch(() => process.exit(1));
 
 if (isWatch) {
 	const watcher = require('@parcel/watcher');
-	watcher.subscribe(srcDir, () => {
-		return build();
+	watcher.subscribe(srcDir, async () => {
+		try {
+			await build();
+		} catch (e) {
+			console.error(e);
+		}
 	});
 }
diff --git a/extensions/markdown-math/esbuild.js b/extensions/markdown-math/esbuild.js
index 2f1899e867e..88475257524 100644
--- a/extensions/markdown-math/esbuild.js
+++ b/extensions/markdown-math/esbuild.js
@@ -56,7 +56,11 @@ build().catch(() => process.exit(1));
 
 if (isWatch) {
 	const watcher = require('@parcel/watcher');
-	watcher.subscribe(srcDir, () => {
-		return build();
+	watcher.subscribe(srcDir, async () => {
+		try {
+			await build();
+		} catch (e) {
+			console.error(e);
+		}
 	});
 }