diff --git a/package.json b/package.json
index 9181a52..10118da 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "express-session": "^1.15.6",
     "flash": "^1.1.0",
     "libxmljs": "^0.19.1",
-    "mathjs": "^4.0.0",
+    "mathjs": "^7.5.1",
     "md5": "^2.2.1",
     "morgan": "^1.9.0",
     "mysql2": "^1.4.2",