diff --git a/package.json b/package.json
index fdca16dccb..6f7f822e6f 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "fs-extra": "9.0.1",
     "marked": "1.2.6",
     "prismjs": "1.21.0",
-    "sitemap-generator": "^8.5.1",
+    "sitemap-generator": "8.5.1",
     "sqlite3": "4.1.1",
     "stylus": "0.54.8",
     "uglify-js": "3.12.1"