diff --git a/package.json b/package.json
index 87d0f35..9deb3c4 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "mariadb": "^2.3.1",
     "mocha": "^7.1.1",
     "mysql2": "^2.1.0",
-    "nyc": "^15.0.1",
+    "nyc": "15.0.1",
     "pg": "^8.0.2",
     "pg-hstore": "^2.3.3",
     "sequelize": "^5.21.6",