diff --git a/.tools/open-coverage-report.ts b/.tools/open-coverage-report.ts
index 4dcc0b04..5da82eb7 100644
--- a/.tools/open-coverage-report.ts
+++ b/.tools/open-coverage-report.ts
@@ -1,3 +1,3 @@
-import { open } from 'https://deno.land/x/opener/mod.ts';
+import { open } from 'https://deno.land/x/opener@v1.0.1/mod.ts';
 
 await open(`file://${Deno.cwd()}/.coverage/report/index.html`);