diff --git a/_epub/package-lock.json b/_epub/package-lock.json
index b50386295..7f54e8b26 100644
--- a/_epub/package-lock.json
+++ b/_epub/package-lock.json
@@ -4323,9 +4323,9 @@
       "optional": true
     },
     "qs": {
-      "version": "6.4.0",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.4.0.tgz",
-      "integrity": "sha1-E+JtKK1rD/qpExLNO/cI7TUecjM=",
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.4.1.tgz",
+      "integrity": "sha512-LQy1Q1fcva/UsnP/6Iaa4lVeM49WiOitu2T4hZCyA/elLKu37L99qcBJk4VCCk+rdLvnMzfKyiN3SZTqdAZGSQ==",
       "dev": true,
       "optional": true
     },