diff --git a/package-lock.json b/package-lock.json
index abce75d..f5755bc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1851,7 +1851,6 @@
       "version": "7.1.6",
       "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
       "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
-      "dev": true,
       "requires": {
         "fs.realpath": "1.0.0",
         "inflight": "1.0.6",
@@ -2818,9 +2817,20 @@
         "npm-packlist": "1.4.1",
         "npmlog": "4.1.2",
         "rc": "1.2.8",
-        "rimraf": "2.6.3",
+        "rimraf": "2.7.1",
         "semver": "5.5.0",
         "tar": "4.4.8"
+      },
+      "dependencies": {
+        "rimraf": {
+          "version": "2.7.1",
+          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.7.1.tgz",
+          "integrity": "sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==",
+          "optional": true,
+          "requires": {
+            "glob": "7.1.6"
+          }
+        }
       }
     },
     "nodemailer": {
@@ -3559,28 +3569,12 @@
       }
     },
     "rimraf": {
-      "version": "2.6.3",
-      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.3.tgz",
-      "integrity": "sha512-mwqeW5XsA2qAejG46gYdENaxXjx9onRNCfn7L0duuP4hCuTIi/QO7PDK07KJfp1d+izWPrzEJDcSqBa0OZQriA==",
-      "optional": true,
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
+      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
+      "dev": true,
       "requires": {
-        "glob": "7.1.3"
-      },
-      "dependencies": {
-        "glob": {
-          "version": "7.1.3",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.3.tgz",
-          "integrity": "sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==",
-          "optional": true,
-          "requires": {
-            "fs.realpath": "1.0.0",
-            "inflight": "1.0.6",
-            "inherits": "2.0.3",
-            "minimatch": "3.0.4",
-            "once": "1.4.0",
-            "path-is-absolute": "1.0.1"
-          }
-        }
+        "glob": "7.1.6"
       }
     },
     "safe-buffer": {
diff --git a/package.json b/package.json
index c717599..5a4bee4 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,8 @@
     "test": "echo \"Error: no test specified\" && exit 1",
     "lint": "tslint --project .",
     "lint:fix": "tslint --project . --fix",
-    "build": "npm run build:json && npm run build:ts && npm run lint && npm run build:doc",
+    "build": "npm run build:clean && npm run build:json && npm run build:ts && npm run lint && npm run build:doc",
+    "build:clean": "rimraf build",
     "build:json": "node ./scripts/build-schemas.js",
     "build:ts": "tsc",
     "build:doc": "npm run build:doc:json",
@@ -39,6 +40,7 @@
     "@types/socket.io": "^2.1.4",
     "@types/tokgen": "^1.0.0",
     "@types/umzug": "^2.2.3",
+    "rimraf": "^3.0.2",
     "tslint": "^6.1.3",
     "tslint-config-standard": "^9.0.0",
     "typescript": "^3.8.3",