diff --git a/.changeset/many-beans-perform.md b/.changeset/many-beans-perform.md
new file mode 100644
index 0000000..4b1ccc9
--- /dev/null
+++ b/.changeset/many-beans-perform.md
@@ -0,0 +1,5 @@
+---
+"@marko/vite": patch
+---
+
+Ignore errors caused by cjs => esm conversion
diff --git a/src/index.ts b/src/index.ts
index 1393a6e..958bd72 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -634,7 +634,11 @@ export default function markoPlugin(opts: Options = {}): vite.Plugin[] {
           if (!isBuild) {
             const ext = path.extname(id);
             if (ext === ".cjs" || (ext === ".js" && isCJSModule(id))) {
-              return cjsToEsm(source);
+              try {
+                return await cjsToEsm(source);
+              } catch {
+                return null;
+              }
             }
           }