diff --git a/package.json b/package.json
index 36453769e6..9a89be213d 100644
--- a/package.json
+++ b/package.json
@@ -84,7 +84,7 @@
     "locate-character": "^2.0.5",
     "magic-string": "^0.25.3",
     "mocha": "^6.2.0",
-    "periscopic": "^2.0.1",
+    "periscopic": "2.0.1",
     "puppeteer": "^2.1.1",
     "rollup": "^1.27.14",
     "source-map": "^0.7.3",