diff --git a/package-lock.json b/package-lock.json
index a797f61..b444cb5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -226,12 +226,12 @@
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+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/bcrypt/-/bcrypt-5.0.0.tgz",
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-        "node-pre-gyp": "0.13.0"
+        "node-addon-api": "^3.0.0",
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@@ -449,9 +449,9 @@
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-      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.3.tgz",
-      "integrity": "sha512-i70fVHhmV3DtTl6nqvZOnIjbY0Pe4kAUjwHj8z0zAdgBtYrJyYwLKCCuRBQ5ppkyL0AkN7HKRnETdmdp1zqNXw=="
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.4.tgz",
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@@ -1087,7 +1087,8 @@
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+          "dev": true,
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@@ -1108,12 +1109,14 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.1.11",
           "bundled": true,
           "dev": true,
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@@ -1128,17 +1131,20 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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-          "dev": true
+          "dev": true,
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@@ -1255,7 +1261,8 @@
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           "version": "2.0.4",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -1267,6 +1274,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
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           }
@@ -1281,6 +1289,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -1288,12 +1297,14 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
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           "bundled": true,
           "dev": true,
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@@ -1312,6 +1323,7 @@
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@@ -1401,7 +1413,8 @@
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           "version": "1.0.1",
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-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -1413,6 +1426,7 @@
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           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -1498,7 +1512,8 @@
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           "version": "5.1.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -1534,6 +1549,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -1553,6 +1569,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -1596,12 +1613,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "yallist": {
           "version": "3.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -2241,9 +2260,9 @@
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-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
-      "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
+      "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
     },
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@@ -2284,11 +2303,11 @@
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-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
-      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "version": "0.5.5",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
+      "integrity": "sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==",
       "requires": {
-        "minimist": "0.0.8"
+        "minimist": "^1.2.5"
       }
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     "mongodb": {
@@ -2395,7 +2414,9 @@
     "nan": {
       "version": "2.14.0",
       "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.0.tgz",
-      "integrity": "sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg=="
+      "integrity": "sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg==",
+      "dev": true,
+      "optional": true
     },
     "nanomatch": {
       "version": "1.2.13",
@@ -2417,9 +2438,9 @@
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-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/needle/-/needle-2.4.0.tgz",
-      "integrity": "sha512-4Hnwzr3mi5L97hMYeNl8wRW/Onhy4nUKR/lVemJ8gJedxxUyBLm9kkrDColJvoSfwi0jCNhD+xCdOtiGDQiRZg==",
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/needle/-/needle-2.5.0.tgz",
+      "integrity": "sha512-o/qITSDR0JCyCKEQ1/1bnUXMmznxabbwi/Y4WwJElf+evwJNFNwIDMCCt5IigFVxgeGBJESLohGtIS9gEzo1fA==",
       "requires": {
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@@ -2437,21 +2458,26 @@
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       "dev": true
     },
+    "node-addon-api": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-3.0.0.tgz",
+      "integrity": "sha512-sSHCgWfJ+Lui/u+0msF3oyCgvdkhxDbkCS6Q8uiJquzOimkJBvX6hl5aSSA7DR1XbMpdM8r7phjcF63sF4rkKg=="
+    },
     "node-pre-gyp": {
-      "version": "0.13.0",
-      "resolved": "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.13.0.tgz",
-      "integrity": "sha512-Md1D3xnEne8b/HGVQkZZwV27WUi1ZRuZBij24TNaZwUPU3ZAFtvT6xxJGaUVillfmMKnn5oD1HoGsp2Ftik7SQ==",
+      "version": "0.15.0",
+      "resolved": "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.15.0.tgz",
+      "integrity": "sha512-7QcZa8/fpaU/BKenjcaeFF9hLz2+7S9AqyXFhlH/rilsQ/hPZKK32RtR5EQHJElgu+q5RfbJ34KriI79UWaorA==",
       "requires": {
         "detect-libc": "^1.0.2",
-        "mkdirp": "^0.5.1",
-        "needle": "^2.2.1",
+        "mkdirp": "^0.5.3",
+        "needle": "^2.5.0",
         "nopt": "^4.0.1",
         "npm-packlist": "^1.1.6",
         "npmlog": "^4.0.2",
         "rc": "^1.2.7",
         "rimraf": "^2.6.1",
         "semver": "^5.3.0",
-        "tar": "^4"
+        "tar": "^4.4.2"
       }
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@@ -2473,9 +2499,9 @@
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-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.1.tgz",
-      "integrity": "sha1-0NRoWv1UFRk8jHUFYC0NF81kR00=",
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.3.tgz",
+      "integrity": "sha512-CvaGwVMztSMJLOeXPrez7fyfObdZqNUK1cPAEzLHrTybIua9pMdmmPR5YwtfNftIOMv3DPUhFaxsZMNTQO20Kg==",
       "requires": {
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@@ -2501,12 +2527,13 @@
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-      "version": "1.4.7",
-      "resolved": "https://registry.npmjs.org/npm-packlist/-/npm-packlist-1.4.7.tgz",
-      "integrity": "sha512-vAj7dIkp5NhieaGZxBJB8fF4R0078rqsmhJcAfXZ6O7JJhjhPK96n5Ry1oZcfLXgfun0GWTZPOxaEyqv8GBykQ==",
+      "version": "1.4.8",
+      "resolved": "https://registry.npmjs.org/npm-packlist/-/npm-packlist-1.4.8.tgz",
+      "integrity": "sha512-5+AZgwru5IevF5ZdnFglB5wNlHG1AOOuw28WhUq8/8emhBmLv6jX5by4WJCh7lW0uSYZYS6DXqIsyZVIXRZU9A==",
       "requires": {
         "ignore-walk": "^3.0.1",
-        "npm-bundled": "^1.0.1"
+        "npm-bundled": "^1.0.1",
+        "npm-normalize-package-bin": "^1.0.1"
       }
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     "npm-run-path": {
diff --git a/package.json b/package.json
index 85c4be4..9020807 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   },
   "homepage": "https://github.com/emabishi/node-jwt#readme",
   "dependencies": {
-    "bcrypt": "^3.0.1",
+    "bcrypt": "^5.0.0",
     "body-parser": "^1.18.3",
     "dotenv": "^6.0.0",
     "express": "^4.16.3",