diff --git a/spa/package-lock.json b/spa/package-lock.json
index 9150723..31fb249 100644
--- a/spa/package-lock.json
+++ b/spa/package-lock.json
@@ -3982,9 +3982,9 @@
       "integrity": "sha1-3dgA2gxmEnOTzKWVDqloo6rxJTs="
     },
     "complex.js": {
-      "version": "2.0.11",
-      "resolved": "https://registry.npmjs.org/complex.js/-/complex.js-2.0.11.tgz",
-      "integrity": "sha512-6IArJLApNtdg1P1dFtn3dnyzoZBEF0MwMnrfF1exSBRpZYoy4yieMkpZhQDC0uwctw48vii0CFVyHfpgZ/DfGw=="
+      "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",
@@ -4584,9 +4584,9 @@
       "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA="
     },
     "decimal.js": {
-      "version": "10.2.0",
-      "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-10.2.0.tgz",
-      "integrity": "sha512-vDPw+rDgn3bZe1+F/pyEwb1oMG2XTlRVgAa6B4KccTEpYgF8w6eQllVbQcfIJnZyvzFtFpxnpGtx8dd7DJp/Rw=="
+      "version": "10.2.1",
+      "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-10.2.1.tgz",
+      "integrity": "sha512-KaL7+6Fw6i5A2XSnsbhm/6B+NuEA7TZ4vqxnd5tXz9sbKtrN9Srj8ab4vKVdK8YAqZO9P1kg45Y6YLoduPf+kw=="
     },
     "decode-uri-component": {
       "version": "0.2.0",
@@ -6203,9 +6203,9 @@
       "integrity": "sha1-mMI9qxF1ZXuMBXPozszZGw/xjIQ="
     },
     "fraction.js": {
-      "version": "4.0.12",
-      "resolved": "https://registry.npmjs.org/fraction.js/-/fraction.js-4.0.12.tgz",
-      "integrity": "sha512-8Z1K0VTG4hzYY7kA/1sj4/r1/RWLBD3xwReT/RCrUCbzPszjNQCCsy3ktkU/eaEqX3MYa4pY37a52eiBlPMlhA=="
+      "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=="
     },
     "fragment-cache": {
       "version": "0.2.1",
@@ -7623,7 +7623,8 @@
             },
             "ansi-regex": {
               "version": "2.1.1",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "aproba": {
               "version": "1.2.0",
@@ -7660,7 +7661,8 @@
             },
             "code-point-at": {
               "version": "1.1.0",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "concat-map": {
               "version": "0.0.1",
@@ -7669,7 +7671,8 @@
             },
             "console-control-strings": {
               "version": "1.1.0",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "core-util-is": {
               "version": "1.0.2",
@@ -7772,7 +7775,8 @@
             },
             "inherits": {
               "version": "2.0.3",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "ini": {
               "version": "1.3.5",
@@ -7782,6 +7786,7 @@
             "is-fullwidth-code-point": {
               "version": "1.0.0",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "number-is-nan": "^1.0.0"
               }
@@ -7794,17 +7799,20 @@
             "minimatch": {
               "version": "3.0.4",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "brace-expansion": "^1.1.7"
               }
             },
             "minimist": {
               "version": "0.0.8",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "minipass": {
               "version": "2.3.5",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "safe-buffer": "^5.1.2",
                 "yallist": "^3.0.0"
@@ -7821,6 +7829,7 @@
             "mkdirp": {
               "version": "0.5.1",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "minimist": "0.0.8"
               }
@@ -7893,7 +7902,8 @@
             },
             "number-is-nan": {
               "version": "1.0.1",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "object-assign": {
               "version": "4.1.1",
@@ -7903,6 +7913,7 @@
             "once": {
               "version": "1.4.0",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "wrappy": "1"
               }
@@ -7978,7 +7989,8 @@
             },
             "safe-buffer": {
               "version": "5.1.2",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -8008,6 +8020,7 @@
             "string-width": {
               "version": "1.0.2",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "code-point-at": "^1.0.0",
                 "is-fullwidth-code-point": "^1.0.0",
@@ -8025,6 +8038,7 @@
             "strip-ansi": {
               "version": "3.0.1",
               "bundled": true,
+              "optional": true,
               "requires": {
                 "ansi-regex": "^2.0.0"
               }
@@ -8063,11 +8077,13 @@
             },
             "wrappy": {
               "version": "1.0.2",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             },
             "yallist": {
               "version": "3.0.3",
-              "bundled": true
+              "bundled": true,
+              "optional": true
             }
           }
         }
@@ -8839,18 +8855,18 @@
       }
     },
     "mathjs": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/mathjs/-/mathjs-6.2.1.tgz",
-      "integrity": "sha512-ySs/G6/d4FWvsnFiN7pkwO4svWVSMJnCXa57JSsE/VRBOFqUhK9ylILD9zb6i4cf6HLxTAQ4kJhQydelIsnPMA==",
+      "version": "7.5.1",
+      "resolved": "https://registry.npmjs.org/mathjs/-/mathjs-7.5.1.tgz",
+      "integrity": "sha512-H2q/Dq0qxBLMw+G84SSXmGqo/znihuxviGgAQwAcyeFLwK2HksvSGNx4f3dllZF51bWOnu2op60VZxH2Sb51Pw==",
       "requires": {
-        "complex.js": "2.0.11",
-        "decimal.js": "10.2.0",
-        "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": "1.1.1"
+        "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.js": {
@@ -13560,9 +13576,9 @@
       }
     },
     "typed-function": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/typed-function/-/typed-function-1.1.1.tgz",
-      "integrity": "sha512-RbN7MaTQBZLJYzDENHPA0nUmWT0Ex80KHItprrgbTPufYhIlTePvCXZxyQK7wgn19FW5bnuaBIKcBb5mRWjB1Q=="
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/typed-function/-/typed-function-2.0.0.tgz",
+      "integrity": "sha512-Hhy1Iwo/e4AtLZNK10ewVVcP2UEs408DS35ubP825w/YgSBK1KVLwALvvIG4yX75QJrxjCpcWkzkVRB0BwwYlA=="
     },
     "typedarray": {
       "version": "0.0.6",
diff --git a/spa/package.json b/spa/package.json
index 341d30b..f615eb8 100644
--- a/spa/package.json
+++ b/spa/package.json
@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "mathjs": "^6.2.1",
+    "mathjs": "^7.5.1",
     "prettier": "^1.18.2",
     "query-string": "^6.8.3",
     "react": "^16.9.0",