diff --git a/server/package-lock.json b/server/package-lock.json
index fcdd256..0029bc9 100644
--- a/server/package-lock.json
+++ b/server/package-lock.json
@@ -148,9 +148,9 @@
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     },
     "complex.js": {
-      "version": "2.0.4",
-      "resolved": "https://registry.npmjs.org/complex.js/-/complex.js-2.0.4.tgz",
-      "integrity": "sha512-Syl95HpxUTS0QjwNxencZsKukgh1zdS9uXeXX2Us0pHaqBR6kiZZi0AkZ9VpZFwHJyVIUVzI4EumjWdXP3fy6w=="
+      "version": "2.0.12",
+      "resolved": "https://registry.npmjs.org/complex.js/-/complex.js-2.0.12.tgz",
+      "integrity": "sha512-oQX99fwL6LrTVg82gDY1dIWXy6qZRnRL35N+YhIX0N7tSwsa0KFy6IEMHTNuCW4mP7FS7MEqZ/2I/afzYwPldw=="
     },
     "component-emitter": {
       "version": "1.3.0",
@@ -277,6 +277,11 @@
       "resolved": "http://registry.npm.taobao.org/decamelize/download/decamelize-1.2.0.tgz",
       "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA="
     },
+    "decimal.js": {
+      "version": "10.2.1",
+      "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-10.2.1.tgz",
+      "integrity": "sha512-KaL7+6Fw6i5A2XSnsbhm/6B+NuEA7TZ4vqxnd5tXz9sbKtrN9Srj8ab4vKVdK8YAqZO9P1kg45Y6YLoduPf+kw=="
+    },
     "delayed-stream": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
@@ -312,6 +317,11 @@
       "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
       "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
     },
+    "escape-latex": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/escape-latex/-/escape-latex-1.2.0.tgz",
+      "integrity": "sha512-nV5aVWW1K0wEiUIEdZ4erkGGH8mDxGyxSeqPzRNtWP7ataw+/olFObw7hujFWlVjNsaDFw5VZ5NzVSIqRgfTiw=="
+    },
     "etag": {
       "version": "1.8.1",
       "resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
@@ -425,6 +435,11 @@
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.1.2.tgz",
       "integrity": "sha1-mMI9qxF1ZXuMBXPozszZGw/xjIQ="
     },
+    "fraction.js": {
+      "version": "4.0.13",
+      "resolved": "https://registry.npmjs.org/fraction.js/-/fraction.js-4.0.13.tgz",
+      "integrity": "sha512-E1fz2Xs9ltlUp+qbiyx9wmt2n9dRzPsS11Jtdb8D2o+cC7wr9xkkKsVKJuBX0ST+LVS+LhLO+SbLJNtfWcJvXA=="
+    },
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       "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
@@ -677,39 +692,18 @@
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-      "version": "3.18.0",
-      "resolved": "https://registry.npmjs.org/mathjs/-/mathjs-3.18.0.tgz",
-      "integrity": "sha512-k5ZNz2Ic86HYqPBj7ZnJHqmEI7s4f8y/ip3zJ3PnFulk05wOxXr3tuSoJJKUpCWMQFFVoXEhJwHbQmY+3Ah2ng==",
+      "version": "7.5.1",
+      "resolved": "https://registry.npmjs.org/mathjs/-/mathjs-7.5.1.tgz",
+      "integrity": "sha512-H2q/Dq0qxBLMw+G84SSXmGqo/znihuxviGgAQwAcyeFLwK2HksvSGNx4f3dllZF51bWOnu2op60VZxH2Sb51Pw==",
       "requires": {
-        "complex.js": "2.0.4",
-        "decimal.js": "9.0.1",
-        "fraction.js": "4.0.4",
-        "javascript-natural-sort": "0.7.1",
-        "seed-random": "2.2.0",
-        "tiny-emitter": "2.0.2",
-        "typed-function": "0.10.6"
-      },
-      "dependencies": {
-        "decimal.js": {
-          "version": "9.0.1",
-          "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-9.0.1.tgz",
-          "integrity": "sha512-2h0iKbJwnImBk4TGk7CG1xadoA0g3LDPlQhQzbZ221zvG0p2YVUedbKIPsOZXKZGx6YmZMJKYOalpCMxSdDqTQ=="
-        },
-        "fraction.js": {
-          "version": "4.0.4",
-          "resolved": "https://registry.npmjs.org/fraction.js/-/fraction.js-4.0.4.tgz",
-          "integrity": "sha512-aK/oGatyYLTtXRHjfEsytX5fieeR5H4s8sLorzcT12taFS+dbMZejnvm9gRa8mZAPwci24ucjq9epDyaq5u8Iw=="
-        },
-        "tiny-emitter": {
-          "version": "2.0.2",
-          "resolved": "https://registry.npmjs.org/tiny-emitter/-/tiny-emitter-2.0.2.tgz",
-          "integrity": "sha512-2NM0auVBGft5tee/OxP4PI3d8WItkDM+fPnaRAVo6xTDI2knbz9eC5ArWGqtGlYqiH3RU5yMpdyTTO7MguC4ow=="
-        },
-        "typed-function": {
-          "version": "0.10.6",
-          "resolved": "https://registry.npmjs.org/typed-function/-/typed-function-0.10.6.tgz",
-          "integrity": "sha512-PYtsDjxyW3vq7Itn2RMz0cn6CrbybIY6XC2i9c1q1o/H94QW8B1Pf3wSsbBDOCMpN1i5jDRrlDsLXFaqXBpfHQ=="
-        }
+        "complex.js": "^2.0.11",
+        "decimal.js": "^10.2.1",
+        "escape-latex": "^1.2.0",
+        "fraction.js": "^4.0.12",
+        "javascript-natural-sort": "^0.7.1",
+        "seed-random": "^2.2.0",
+        "tiny-emitter": "^2.1.0",
+        "typed-function": "^2.0.0"
       }
     },
     "md5": {
@@ -1021,6 +1015,11 @@
         }
       }
     },
+    "tiny-emitter": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/tiny-emitter/-/tiny-emitter-2.1.0.tgz",
+      "integrity": "sha512-NB6Dk1A9xgQPMoGqC5CVXn123gWyte215ONT5Pp5a0yt4nlEoO1ZWeCwpncaekPHXO60i47ihFnZPiRPjRMq4Q=="
+    },
     "type-is": {
       "version": "1.6.15",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.15.tgz",
@@ -1030,6 +1029,11 @@
         "mime-types": "~2.1.15"
       }
     },
+    "typed-function": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/typed-function/-/typed-function-2.0.0.tgz",
+      "integrity": "sha512-Hhy1Iwo/e4AtLZNK10ewVVcP2UEs408DS35ubP825w/YgSBK1KVLwALvvIG4yX75QJrxjCpcWkzkVRB0BwwYlA=="
+    },
     "ultron": {
       "version": "1.1.0",
       "resolved": "http://registry.npm.taobao.org/ultron/download/ultron-1.1.0.tgz",
diff --git a/server/package.json b/server/package.json
index 3797ba2..51a21d4 100644
--- a/server/package.json
+++ b/server/package.json
@@ -14,7 +14,7 @@
     "leancloud-realtime": "^3.5.7",
     "leancloud-storage": "^3.3.0",
     "leanengine": "^3.0.2",
-    "mathjs": "^3.18.0",
+    "mathjs": "^7.5.1",
     "workerpool": "^1.0.0"
   },
   "engines": {