diff --git a/packages/trace-viewer/src/sw/traceModelBackends.ts b/packages/trace-viewer/src/sw/traceModelBackends.ts
index 23c343fded..1318b298a7 100644
--- a/packages/trace-viewer/src/sw/traceModelBackends.ts
+++ b/packages/trace-viewer/src/sw/traceModelBackends.ts
@@ -87,7 +87,7 @@ export class FetchTraceModelBackend implements TraceModelBackend {
   constructor(traceURL: string) {
     this._traceURL = traceURL;
     this._entriesPromise = fetch(traceURL).then(async response => {
-      const json = JSON.parse(await response.text());
+      const json = await response.json();
       const entries = new Map<string, string>();
       for (const entry of json.entries)
         entries.set(entry.name, entry.path);