diff --git a/package-lock.json b/package-lock.json
index 57257f0..58344fb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -137,15 +137,6 @@
         "@babel/helper-plugin-utils": "^7.0.0"
       }
     },
-    "@babel/polyfill": {
-      "version": "7.6.0",
-      "resolved": "https://registry.npmjs.org/@babel/polyfill/-/polyfill-7.6.0.tgz",
-      "integrity": "sha512-q5BZJI0n/B10VaQQvln1IlDK3BTBJFbADx7tv+oXDPIDZuTo37H5Adb9jhlXm/fEN4Y7/64qD9mnrJJG7rmaTw==",
-      "requires": {
-        "core-js": "^2.6.5",
-        "regenerator-runtime": "^0.13.2"
-      }
-    },
     "@babel/template": {
       "version": "7.6.0",
       "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.6.0.tgz",
@@ -453,11 +444,6 @@
         "@babel/types": "^7.3.0"
       }
     },
-    "@types/bluebird": {
-      "version": "3.5.27",
-      "resolved": "https://registry.npmjs.org/@types/bluebird/-/bluebird-3.5.27.tgz",
-      "integrity": "sha512-6BmYWSBea18+tSjjSC3QIyV93ZKAeNWGM7R6aYt1ryTZXrlHF+QLV0G2yV0viEGVyRkyQsWfMoJ0k/YghBX5sQ=="
-    },
     "@types/istanbul-lib-coverage": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.1.tgz",
@@ -805,9 +791,9 @@
       "integrity": "sha512-S4XzBk5sMB+Rcb/LNcpzXr57VRTxgAvaAEDAl1AwRx27j00hT84O6OkteE7u8UB3NuaaygCRrEpqox4uDOrbdQ=="
     },
     "bluebird": {
-      "version": "3.5.5",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.5.tgz",
-      "integrity": "sha512-5am6HnnfN+urzt4yfg7IgTbotDjIT/u8AJpEt0sIU9FtXfVeezXAPKswrG+xKUCOYAINpSdgZVDU6QFh+cuH3w=="
+      "version": "3.7.1",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.1.tgz",
+      "integrity": "sha512-DdmyoGCleJnkbp3nkbxTLJ18rjDsE4yCggEwKNXkeV123sPNfOCYeDoeuOY+F2FrSjO1YXcTU+dsy96KMy+gcg=="
     },
     "body-parser": {
       "version": "1.19.0",
@@ -1029,9 +1015,9 @@
       "dev": true
     },
     "colorette": {
-      "version": "1.0.7",
-      "resolved": "https://registry.npmjs.org/colorette/-/colorette-1.0.7.tgz",
-      "integrity": "sha512-KeK4klsvAgdODAjFPm6QLzvStizJqlxMBtVo4KQMCgk5tt/tf9rAzxmxLHNRynJg3tJjkKGKbHx3j4HLox27Lw=="
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/colorette/-/colorette-1.1.0.tgz",
+      "integrity": "sha512-6S062WDQUXi6hOfkO/sBPVwE5ASXY4G2+b4atvhJfSsuUUhIaUKlkjLe9692Ipyt5/a+IPF5aVTu3V5gvXq5cg=="
     },
     "combined-stream": {
       "version": "1.0.8",
@@ -1043,9 +1029,9 @@
       }
     },
     "commander": {
-      "version": "2.20.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.0.tgz",
-      "integrity": "sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ=="
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-3.0.2.tgz",
+      "integrity": "sha512-Gar0ASD4BDyKC4hl4DwHqDrmvjoxWKZigVnAbn5H1owvm4CxCPdb0HQDehwNYMJpla5+M2tPmPARzhtYuwpHow=="
     },
     "component-emitter": {
       "version": "1.3.0",
@@ -1101,11 +1087,6 @@
       "resolved": "https://registry.npmjs.org/copy-descriptor/-/copy-descriptor-0.1.1.tgz",
       "integrity": "sha1-Z29us8OZl8LuGsOpJP1hJHSPV40="
     },
-    "core-js": {
-      "version": "2.6.9",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.9.tgz",
-      "integrity": "sha512-HOpZf6eXmnl7la+cUdMnLvUxKNqLUzJvgIziQ0DiF3JwSImNphIqdGqzj6hIKyX04MmV0poclQ7+wjWvxQyR2A=="
-    },
     "core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
@@ -1800,7 +1781,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -1821,12 +1803,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -1841,17 +1825,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -1968,7 +1955,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -1980,6 +1968,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -1994,6 +1983,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -2001,12 +1991,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -2025,6 +2017,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -2105,7 +2098,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -2117,6 +2111,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -2202,7 +2197,8 @@
         "safe-buffer": {
           "version": "5.1.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -2238,6 +2234,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -2257,6 +2254,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -2300,12 +2298,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -2336,9 +2336,9 @@
       "integrity": "sha1-3BXKHGcjh8p2vTesCjlbogQqLCg="
     },
     "getopts": {
-      "version": "2.2.3",
-      "resolved": "https://registry.npmjs.org/getopts/-/getopts-2.2.3.tgz",
-      "integrity": "sha512-viEcb8TpgeG05+Nqo5EzZ8QR0hxdyrYDp6ZSTZqe2M/h53Bk036NmqG38Vhf5RGirC/Of9Xql+v66B2gp256SQ=="
+      "version": "2.2.5",
+      "resolved": "https://registry.npmjs.org/getopts/-/getopts-2.2.5.tgz",
+      "integrity": "sha512-9jb7AW5p3in+IiJWhQiZmmwkpLaR/ccTWdWQCtZM66HJcHHLegowh4q4tSD7gouUyeNvFWRavfK9GXosQHDpFA=="
     },
     "getpass": {
       "version": "0.1.7",
@@ -3473,27 +3473,25 @@
       "dev": true
     },
     "knex": {
-      "version": "0.16.5",
-      "resolved": "https://registry.npmjs.org/knex/-/knex-0.16.5.tgz",
-      "integrity": "sha512-1RVxMU8zGOBqgmXlAvs8vohg9MD14iiRZZPe0IeQXd554n4xxPmoMkbH4hlFeqfM6eOdFE3AVqVSncL3YuocqA==",
-      "requires": {
-        "@babel/polyfill": "^7.4.3",
-        "@types/bluebird": "^3.5.26",
-        "bluebird": "^3.5.4",
-        "colorette": "1.0.7",
-        "commander": "^2.20.0",
+      "version": "0.19.5",
+      "resolved": "https://registry.npmjs.org/knex/-/knex-0.19.5.tgz",
+      "integrity": "sha512-Hy258avCVircQq+oj3WBqPzl8jDIte438Qlq+8pt1i/TyLYVA4zPh2uKc7Bx0t+qOpa6D42HJ2jjtl2vagzilw==",
+      "requires": {
+        "bluebird": "^3.7.0",
+        "colorette": "1.1.0",
+        "commander": "^3.0.2",
         "debug": "4.1.1",
-        "getopts": "2.2.3",
-        "inherits": "~2.0.3",
+        "getopts": "2.2.5",
+        "inherits": "~2.0.4",
         "interpret": "^1.2.0",
         "liftoff": "3.1.0",
-        "lodash": "^4.17.11",
+        "lodash": "^4.17.15",
         "mkdirp": "^0.5.1",
-        "pg-connection-string": "2.0.0",
-        "tarn": "^1.1.5",
-        "tildify": "1.2.0",
-        "uuid": "^3.3.2",
-        "v8flags": "^3.1.2"
+        "pg-connection-string": "2.1.0",
+        "tarn": "^2.0.0",
+        "tildify": "2.0.0",
+        "uuid": "^3.3.3",
+        "v8flags": "^3.1.3"
       },
       "dependencies": {
         "debug": {
@@ -3504,6 +3502,11 @@
             "ms": "^2.1.1"
           }
         },
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
+        },
         "ms": {
           "version": "2.1.2",
           "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
@@ -4004,11 +4007,6 @@
         }
       }
     },
-    "os-homedir": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
-      "integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M="
-    },
     "p-each-series": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/p-each-series/-/p-each-series-1.0.0.tgz",
@@ -4152,9 +4150,9 @@
       "dev": true
     },
     "pg-connection-string": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/pg-connection-string/-/pg-connection-string-2.0.0.tgz",
-      "integrity": "sha1-Pu/lmX4G2Ugh5NUC5CtqHHP434I="
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/pg-connection-string/-/pg-connection-string-2.1.0.tgz",
+      "integrity": "sha512-bhlV7Eq09JrRIvo1eKngpwuqKtJnNhZdpdOlvrPrA4dxqXPjxSrbNrfnIDmTpwMyRszrcV4kU5ZA4mMsQUrjdg=="
     },
     "pify": {
       "version": "3.0.0",
@@ -4334,11 +4332,6 @@
         "resolve": "^1.1.6"
       }
     },
-    "regenerator-runtime": {
-      "version": "0.13.3",
-      "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.3.tgz",
-      "integrity": "sha512-naKIZz2GQ8JWh///G7L3X6LaQUAMp2lvb1rvwwsURe/VXwD6VMfr+/1NuNw3ag8v2kY1aQ/go5SNn79O9JU7yw=="
-    },
     "regex-not": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/regex-not/-/regex-not-1.0.2.tgz",
@@ -5052,9 +5045,9 @@
       "dev": true
     },
     "tarn": {
-      "version": "1.1.5",
-      "resolved": "https://registry.npmjs.org/tarn/-/tarn-1.1.5.tgz",
-      "integrity": "sha512-PMtJ3HCLAZeedWjJPgGnCvcphbCOMbtZpjKgLq3qM5Qq9aQud+XHrL0WlrlgnTyS8U+jrjGbEXprFcQrxPy52g=="
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/tarn/-/tarn-2.0.0.tgz",
+      "integrity": "sha512-7rNMCZd3s9bhQh47ksAQd92ADFcJUjjbyOvyFjNLwTPpGieFHMC84S+LOzw0fx1uh6hnDz/19r8CPMnIjJlMMA=="
     },
     "test-exclude": {
       "version": "5.2.3",
@@ -5075,12 +5068,9 @@
       "dev": true
     },
     "tildify": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/tildify/-/tildify-1.2.0.tgz",
-      "integrity": "sha1-3OwD9V3Km3qj5bBPIYF+tW5jWIo=",
-      "requires": {
-        "os-homedir": "^1.0.0"
-      }
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/tildify/-/tildify-2.0.0.tgz",
+      "integrity": "sha512-Cc+OraorugtXNfs50hU9KS369rFXCfgGLpfCfvlc+Ud5u6VWmUQsOAa9HbTvheQdYnrdJqqv1e5oIqXppMYnSw=="
     },
     "tmpl": {
       "version": "1.0.4",
diff --git a/package.json b/package.json
index 79ee426..75ef613 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   "dependencies": {
     "body-parser": "^1.19.0",
     "express": "^4.17.1",
-    "knex": "^0.16.3",
+    "knex": "^0.19.5",
     "mysql": "^2.17.1"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index c364df1..a52018a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -610,10 +610,10 @@ bignumber.js@7.2.1:
   resolved "https://registry.yarnpkg.com/bignumber.js/-/bignumber.js-7.2.1.tgz#80c048759d826800807c4bfd521e50edbba57a5f"
   integrity sha512-S4XzBk5sMB+Rcb/LNcpzXr57VRTxgAvaAEDAl1AwRx27j00hT84O6OkteE7u8UB3NuaaygCRrEpqox4uDOrbdQ==
 
-bluebird@^3.5.5:
-  version "3.5.5"
-  resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.5.5.tgz#a8d0afd73251effbbd5fe384a77d73003c17a71f"
-  integrity sha512-5am6HnnfN+urzt4yfg7IgTbotDjIT/u8AJpEt0sIU9FtXfVeezXAPKswrG+xKUCOYAINpSdgZVDU6QFh+cuH3w==
+bluebird@^3.7.0:
+  version "3.7.1"
+  resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.1.tgz#df70e302b471d7473489acf26a93d63b53f874de"
+  integrity sha512-DdmyoGCleJnkbp3nkbxTLJ18rjDsE4yCggEwKNXkeV123sPNfOCYeDoeuOY+F2FrSjO1YXcTU+dsy96KMy+gcg==
 
 body-parser@1.19.0, body-parser@^1.19.0:
   version "1.19.0"
@@ -801,10 +801,10 @@ combined-stream@^1.0.6, combined-stream@~1.0.6:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-3.0.1.tgz#4595aec3530525e671fb6f85fb173df8ff8bf57a"
-  integrity sha512-UNgvDd+csKdc9GD4zjtkHKQbT8Aspt2jCBqNSPp53vAS0L1tS9sXB2TCEOPHJ7kt9bN/niWkYj8T3RQSoMXdSQ==
+commander@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-3.0.2.tgz#6837c3fb677ad9933d1cfba42dd14d5117d6b39e"
+  integrity sha512-Gar0ASD4BDyKC4hl4DwHqDrmvjoxWKZigVnAbn5H1owvm4CxCPdb0HQDehwNYMJpla5+M2tPmPARzhtYuwpHow==
 
 commander@~2.20.0:
   version "2.20.0"
@@ -2432,14 +2432,14 @@ kleur@^3.0.3:
   resolved "https://registry.yarnpkg.com/kleur/-/kleur-3.0.3.tgz#a79c9ecc86ee1ce3fa6206d1216c501f147fc07e"
   integrity sha512-eTIzlVOSUR+JxdDFepEYcBMtZ9Qqdef+rnzWdRZuMbOywu5tO2w2N7rqjoANZ5k9vywhL6Br1VRjUIgTQx4E8w==
 
-knex@^0.19.4:
-  version "0.19.4"
-  resolved "https://registry.yarnpkg.com/knex/-/knex-0.19.4.tgz#cf62f8824392387152a0a188a6585d5dea6832bb"
-  integrity sha512-FRnR2iWEAoKkrVo3KyiEYeGwUjZOZT2WDko/tn3nCKzQdn6m8+5qSUeYLGa9zM8SwFGJriYKQSSMiDJKLILcMQ==
+knex@^0.19.5:
+  version "0.19.5"
+  resolved "https://registry.yarnpkg.com/knex/-/knex-0.19.5.tgz#3597ebecf88a5942f18c3e6d91af53bda59eeb5d"
+  integrity sha512-Hy258avCVircQq+oj3WBqPzl8jDIte438Qlq+8pt1i/TyLYVA4zPh2uKc7Bx0t+qOpa6D42HJ2jjtl2vagzilw==
   dependencies:
-    bluebird "^3.5.5"
+    bluebird "^3.7.0"
     colorette "1.1.0"
-    commander "^3.0.1"
+    commander "^3.0.2"
     debug "4.1.1"
     getopts "2.2.5"
     inherits "~2.0.4"