diff --git a/package-lock.json b/package-lock.json
index baa6565d..f180ff7f 100644
--- a/package-lock.json
+++ b/package-lock.json
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-          "version": "3.0.0",
+          "version": "3.1.0",
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           "dev": true,
           "requires": {
@@ -2652,7 +2688,7 @@
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         },
         "spdx-exceptions": {
-          "version": "2.1.0",
+          "version": "2.2.0",
           "bundled": true,
           "dev": true
         },
@@ -2666,7 +2702,7 @@
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         },
         "spdx-license-ids": {
-          "version": "3.0.0",
+          "version": "3.0.3",
           "bundled": true,
           "dev": true
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@@ -2697,16 +2733,8 @@
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-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        },
         "test-exclude": {
-          "version": "5.0.0",
+          "version": "5.1.0",
           "bundled": true,
           "dev": true,
           "requires": {
@@ -2717,43 +2745,30 @@
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         },
         "uglify-js": {
-          "version": "2.8.29",
+          "version": "3.4.9",
           "bundled": true,
           "dev": true,
           "optional": true,
           "requires": {
-            "source-map": "~0.5.1",
-            "uglify-to-browserify": "~1.0.0",
-            "yargs": "~3.10.0"
+            "commander": "~2.17.1",
+            "source-map": "~0.6.1"
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           "dependencies": {
-            "yargs": {
-              "version": "3.10.0",
+            "source-map": {
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               "dev": true,
-              "optional": true,
-              "requires": {
-                "camelcase": "^1.0.2",
-                "cliui": "^2.1.0",
-                "decamelize": "^1.0.0",
-                "window-size": "0.1.0"
-              }
+              "optional": true
             }
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-        "uglify-to-browserify": {
-          "version": "1.0.2",
-          "bundled": true,
-          "dev": true,
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         "uuid": {
           "version": "3.3.2",
           "bundled": true,
           "dev": true
         },
         "validate-npm-package-license": {
-          "version": "3.0.3",
+          "version": "3.0.4",
           "bundled": true,
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@@ -2774,12 +2789,6 @@
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@@ -2833,7 +2842,7 @@
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         },
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-          "version": "2.3.0",
+          "version": "2.4.2",
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@@ -2843,7 +2852,7 @@
           }
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         "y18n": {
-          "version": "3.2.1",
+          "version": "4.0.0",
           "bundled": true,
           "dev": true
         },
@@ -2853,87 +2862,31 @@
           "dev": true
         },
         "yargs": {
-          "version": "11.1.0",
+          "version": "12.0.5",
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           "dev": true,
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             "cliui": "^4.0.0",
-            "decamelize": "^1.1.1",
-            "find-up": "^2.1.0",
+            "decamelize": "^1.2.0",
+            "find-up": "^3.0.0",
             "get-caller-file": "^1.0.1",
-            "os-locale": "^2.0.0",
+            "os-locale": "^3.0.0",
             "require-directory": "^2.1.1",
             "require-main-filename": "^1.0.1",
             "set-blocking": "^2.0.0",
             "string-width": "^2.0.0",
             "which-module": "^2.0.0",
-            "y18n": "^3.2.1",
-            "yargs-parser": "^9.0.2"
-          },
-          "dependencies": {
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-              }
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-            "locate-path": {
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-              "bundled": true,
-              "dev": true,
-              "requires": {
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-                "path-exists": "^3.0.0"
-              }
-            },
-            "p-limit": {
-              "version": "1.3.0",
-              "bundled": true,
-              "dev": true,
-              "requires": {
-                "p-try": "^1.0.0"
-              }
-            },
-            "p-locate": {
-              "version": "2.0.0",
-              "bundled": true,
-              "dev": true,
-              "requires": {
-                "p-limit": "^1.1.0"
-              }
-            },
-            "p-try": {
-              "version": "1.0.0",
-              "bundled": true,
-              "dev": true
-            }
+            "y18n": "^3.2.1 || ^4.0.0",
+            "yargs-parser": "^11.1.1"
           }
         },
         "yargs-parser": {
-          "version": "9.0.2",
+          "version": "11.1.1",
           "bundled": true,
           "dev": true,
           "requires": {
-            "camelcase": "^4.1.0"
-          },
-          "dependencies": {
-            "camelcase": {
-              "version": "4.1.0",
-              "bundled": true,
-              "dev": true
-            }
+            "camelcase": "^5.0.0",
+            "decamelize": "^1.2.0"
           }
         }
       }
@@ -3210,9 +3163,9 @@
       "dev": true
     },
     "resolve": {
-      "version": "1.9.0",
-      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.9.0.tgz",
-      "integrity": "sha512-TZNye00tI67lwYvzxCxHGjwTNlUV70io54/Ed4j6PscB8xVfuBJpRenI/o6dVk0cY0PYTY27AgCoGGxRnYuItQ==",
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.10.0.tgz",
+      "integrity": "sha512-3sUr9aq5OfSg2S9pNtPA9hL1FVEAjvfOC4leW0SNf/mpnaakz2a9femSd6LqAww2RaFctwyf1lCqnTHuF1rxDg==",
       "dev": true,
       "requires": {
         "path-parse": "^1.0.6"
@@ -3269,29 +3222,18 @@
       "dev": true
     },
     "sinon": {
-      "version": "7.2.2",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-7.2.2.tgz",
-      "integrity": "sha512-WLagdMHiEsrRmee3jr6IIDntOF4kbI6N2pfbi8wkv50qaUQcBglkzkjtoOEbeJ2vf1EsrHhLI+5Ny8//WHdMoA==",
+      "version": "7.2.3",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-7.2.3.tgz",
+      "integrity": "sha512-i6j7sqcLEqTYqUcMV327waI745VASvYuSuQMCjbAwlpAeuCgKZ3LtrjDxAbu+GjNQR0FEDpywtwGCIh8GicNyg==",
       "dev": true,
       "requires": {
-        "@sinonjs/commons": "^1.2.0",
+        "@sinonjs/commons": "^1.3.0",
         "@sinonjs/formatio": "^3.1.0",
         "@sinonjs/samsam": "^3.0.2",
         "diff": "^3.5.0",
         "lolex": "^3.0.0",
-        "nise": "^1.4.7",
+        "nise": "^1.4.8",
         "supports-color": "^5.5.0"
-      },
-      "dependencies": {
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
       }
     },
     "source-map": {
@@ -3301,9 +3243,9 @@
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-      "version": "0.5.9",
-      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.9.tgz",
-      "integrity": "sha512-gR6Rw4MvUlYy83vP0vxoVNzM6t8MUXqNuRsuBmBHQDu1Fh6X015FrLdgoDKcNdkwGubozq0P4N0Q37UyFVr1EA==",
+      "version": "0.5.10",
+      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.10.tgz",
+      "integrity": "sha512-YfQ3tQFTK/yzlGJuX8pTwa4tifQj4QS2Mj7UegOu8jAz59MqIiMGPXxQhVQiIMNzayuUSF/jEuVnfFF5JqybmQ==",
       "dev": true,
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@@ -3438,10 +3380,13 @@
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-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-      "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-      "dev": true
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "dev": true,
+      "requires": {
+        "has-flag": "^3.0.0"
+      }
     },
     "tempfile": {
       "version": "1.1.1",
@@ -3506,27 +3451,16 @@
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-      "version": "7.0.1",
-      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-7.0.1.tgz",
-      "integrity": "sha512-BVwVbPJRspzNh2yfslyT1PSbl5uIk03EZlb493RKHN4qej/D06n1cEhjlOJG69oFsE7OT8XjpTUcYf6pKTLMhw==",
+      "version": "8.0.2",
+      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-8.0.2.tgz",
+      "integrity": "sha512-MosTrinKmaAcWgO8tqMjMJB22h+sp3Rd1i4fdoWY4mhBDekOwIAKI/bzmRi7IcbCmjquccYg2gcF6NBkLgr0Tw==",
       "dev": true,
       "requires": {
-        "arrify": "^1.0.0",
-        "buffer-from": "^1.1.0",
+        "arg": "^4.1.0",
         "diff": "^3.1.0",
         "make-error": "^1.1.1",
-        "minimist": "^1.2.0",
-        "mkdirp": "^0.5.1",
         "source-map-support": "^0.5.6",
-        "yn": "^2.0.0"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.0",
-          "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
-          "dev": true
-        }
+        "yn": "^3.0.0"
       }
     },
     "tslib": {
@@ -3536,9 +3470,9 @@
       "dev": true
     },
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-      "version": "5.12.0",
-      "resolved": "https://registry.npmjs.org/tslint/-/tslint-5.12.0.tgz",
-      "integrity": "sha512-CKEcH1MHUBhoV43SA/Jmy1l24HJJgI0eyLbBNSRyFlsQvb9v6Zdq+Nz2vEOH00nC5SUx4SneJ59PZUS/ARcokQ==",
+      "version": "5.12.1",
+      "resolved": "https://registry.npmjs.org/tslint/-/tslint-5.12.1.tgz",
+      "integrity": "sha512-sfodBHOucFg6egff8d1BvuofoOQ/nOeYNfbp7LDlKBcLNrL3lmS5zoiDGyOMdT7YsEXAwWpTdAHwOGOc8eRZAw==",
       "dev": true,
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         "babel-code-frame": "^6.22.0",
@@ -3573,9 +3507,9 @@
           "dev": true
         },
         "tsutils": {
-          "version": "3.7.0",
-          "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-3.7.0.tgz",
-          "integrity": "sha512-n+e+3q7Jx2kfZw7tjfI9axEIWBY0sFMOlC+1K70X0SeXpO/UYSB+PN+E9tIJNqViB7oiXQdqD7dNchnvoneZew==",
+          "version": "3.8.0",
+          "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-3.8.0.tgz",
+          "integrity": "sha512-XQdPhgcoTbCD8baXC38PQ0vpTZ8T3YrE+vR66YIj/xvDt1//8iAhafpIT/4DmvzzC1QFapEImERu48Pa01dIUA==",
           "dev": true,
           "requires": {
             "tslib": "^1.8.1"
@@ -3599,9 +3533,9 @@
       "dev": true
     },
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-      "version": "0.14.0",
-      "resolved": "https://registry.npmjs.org/typedoc/-/typedoc-0.14.0.tgz",
-      "integrity": "sha512-9DOYWO6O02YGZfbNOrELtmpQF4Eba/6AfNQNt46iRuIokoEq1Axdz9Ae/XjgdoXsM2ShGlDZsAO36BwRVz/Nmw==",
+      "version": "0.14.2",
+      "resolved": "https://registry.npmjs.org/typedoc/-/typedoc-0.14.2.tgz",
+      "integrity": "sha512-aEbgJXV8/KqaVhcedT7xG6d2r+mOvB5ep3eIz1KuB5sc4fDYXcepEEMdU7XSqLFO5hVPu0nllHi1QxX2h/QlpQ==",
       "dev": true,
       "requires": {
         "@types/fs-extra": "^5.0.3",
@@ -3613,7 +3547,7 @@
         "@types/shelljs": "^0.8.0",
         "fs-extra": "^7.0.0",
         "handlebars": "^4.0.6",
-        "highlight.js": "9.12.0",
+        "highlight.js": "^9.13.1",
         "lodash": "^4.17.10",
         "marked": "^0.4.0",
         "minimatch": "^3.0.0",
@@ -3621,6 +3555,14 @@
         "shelljs": "^0.8.2",
         "typedoc-default-themes": "^0.5.0",
         "typescript": "3.2.x"
+      },
+      "dependencies": {
+        "typescript": {
+          "version": "3.2.4",
+          "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.2.4.tgz",
+          "integrity": "sha512-0RNDbSdEokBeEAkgNbxJ+BLwSManFy9TeXz8uW+48j/xhEXv1ePME60olyzw2XzUqUBNAYFeJadIqAgNqIACwg==",
+          "dev": true
+        }
       }
     },
     "typedoc-default-themes": {
@@ -3630,9 +3572,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "3.2.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.2.2.tgz",
-      "integrity": "sha512-VCj5UiSyHBjwfYacmDuc/NOk4QQixbE+Wn7MFJuS0nRuPQbof132Pw4u53dm264O8LPc2MVsc7RJNml5szurkg==",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.3.3.tgz",
+      "integrity": "sha512-Y21Xqe54TBVp+VDSNbuDYdGw0BpoR/Q6wo/+35M8PAU0vipahnyduJWirxxdxjsAkS7hue53x2zp8gz7F05u0A==",
       "dev": true
     },
     "uglify-js": {
@@ -3797,9 +3739,9 @@
       }
     },
     "yn": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/yn/-/yn-2.0.0.tgz",
-      "integrity": "sha1-5a2ryKz0CPY4X8dklWhMiOavaJo=",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.0.0.tgz",
+      "integrity": "sha512-+Wo/p5VRfxUgBUGy2j/6KX2mj9AYJWOHuhMjMcbBFc3y54o9/4buK1ksBvuiK01C3kby8DH9lSmJdSxw+4G/2Q==",
       "dev": true
     }
   }
diff --git a/package.json b/package.json
index ac832f38..cf5d5148 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   "scripts": {
     "build": "npm run tslint && npm run compile && npm run documentation",
     "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s -r 0",
+    "check-configuration": "openstapps-configuration",
     "compile": "tsc",
     "documentation": "typedoc --includeDeclarations --excludeExternals --mode modules --out docs src",
     "prepublishOnly": "npm run build",
@@ -24,45 +25,48 @@
   "typings": "./lib/Logger.d.ts",
   "main": "./lib/Logger.js",
   "nyc": {
+    "all": true,
+    "branches": 95,
     "check-coverage": true,
-    "per-file": true,
-    "lines": 0,
-    "statements": 0,
-    "functions": 0,
-    "branches": 0,
-    "include": [
-      "src"
+    "exclude": [
+      "src/test/**/*.spec.ts",
+      "src/cli.ts"
     ],
     "extension": [
       ".ts"
     ],
+    "functions": 95,
+    "include": [
+      "src"
+    ],
+    "lines": 95,
+    "per-file": true,
     "reporter": [
       "html",
       "text-summary"
     ],
-    "all": true
+    "statements": 95
   },
   "devDependencies": {
-    "@openstapps/configuration": "0.5.0",
+    "@openstapps/configuration": "0.6.0",
     "@types/chai": "4.1.7",
-    "@types/mocha": "5.2.5",
-    "@types/sinon": "7.0.3",
+    "@types/mocha": "5.2.6",
+    "@types/sinon": "7.0.6",
     "chai": "4.2.0",
     "conventional-changelog-cli": "2.0.11",
     "mocha": "5.2.0",
     "mocha-typescript": "1.1.17",
-    "nyc": "13.1.0",
-    "sinon": "7.2.2",
-    "ts-node": "7.0.1",
-    "tslint": "5.12.0",
-    "typedoc": "0.14.0",
-    "typescript": "3.2.2"
+    "nyc": "13.2.0",
+    "sinon": "7.2.3",
+    "ts-node": "8.0.2",
+    "tslint": "5.12.1",
+    "typedoc": "0.14.2",
+    "typescript": "3.3.3"
   },
   "dependencies": {
-    "@types/circular-json": "0.4.0",
-    "@types/node": "10.12.18",
-    "@types/nodemailer": "4.6.5",
-    "circular-json": "0.5.9",
+    "@types/node": "11.9.3",
+    "@types/nodemailer": "4.6.6",
+    "flatted": "2.0.0",
     "nodemailer": "5.1.1"
   }
 }
diff --git a/src/Logger.ts b/src/Logger.ts
index b5495286..f688048e 100644
--- a/src/Logger.ts
+++ b/src/Logger.ts
@@ -12,7 +12,7 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {stringify} from 'circular-json';
+import {stringify} from 'flatted';
 import {Transport, TransportWithVerification} from './Transport';
 
 /**