diff --git a/jest.config.js b/jest.config.js
index deabd39..7e89b4a 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -67,7 +67,7 @@ module.exports = {
   // A set of global variables that need to be available in all test environments
   globals: {
     "ts-jest": {
-      "tsConfigFile": "tsconfig.tests.json"
+      "tsConfig": "tsconfig.tests.json"
     }
   },
 
diff --git a/package-lock.json b/package-lock.json
index 6f94846..368b0da 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1118,44 +1118,6 @@
       "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ==",
       "dev": true
     },
-    "babel-code-frame": {
-      "version": "6.26.0",
-      "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
-      "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
-      "dev": true,
-      "requires": {
-        "chalk": "^1.1.3",
-        "esutils": "^2.0.2",
-        "js-tokens": "^3.0.2"
-      },
-      "dependencies": {
-        "ansi-styles": {
-          "version": "2.2.1",
-          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
-          "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-          "dev": true
-        },
-        "chalk": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
-          "dev": true,
-          "requires": {
-            "ansi-styles": "^2.2.1",
-            "escape-string-regexp": "^1.0.2",
-            "has-ansi": "^2.0.0",
-            "strip-ansi": "^3.0.0",
-            "supports-color": "^2.0.0"
-          }
-        },
-        "supports-color": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
-        }
-      }
-    },
     "babel-jest": {
       "version": "24.3.1",
       "resolved": "https://registry.npmjs.org/babel-jest/-/babel-jest-24.3.1.tgz",
@@ -3745,7 +3707,7 @@
         },
         "chalk": {
           "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "requires": {
@@ -3758,7 +3720,7 @@
         },
         "lodash": {
           "version": "3.10.1",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
+          "resolved": "http://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
           "integrity": "sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y=",
           "dev": true
         },
@@ -7227,29 +7189,30 @@
       }
     },
     "tslib": {
-      "version": "1.9.3",
-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
-      "integrity": "sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ==",
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.10.0.tgz",
+      "integrity": "sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==",
       "dev": true
     },
     "tslint": {
-      "version": "5.11.0",
-      "resolved": "https://registry.npmjs.org/tslint/-/tslint-5.11.0.tgz",
-      "integrity": "sha1-mPMMAurjzecAYgHkwzywi0hYHu0=",
+      "version": "5.18.0",
+      "resolved": "https://registry.npmjs.org/tslint/-/tslint-5.18.0.tgz",
+      "integrity": "sha512-Q3kXkuDEijQ37nXZZLKErssQVnwCV/+23gFEMROi8IlbaBG6tXqLPQJ5Wjcyt/yHPKBC+hD5SzuGaMora+ZS6w==",
       "dev": true,
       "requires": {
-        "babel-code-frame": "^6.22.0",
+        "@babel/code-frame": "^7.0.0",
         "builtin-modules": "^1.1.1",
         "chalk": "^2.3.0",
         "commander": "^2.12.1",
         "diff": "^3.2.0",
         "glob": "^7.1.1",
-        "js-yaml": "^3.7.0",
+        "js-yaml": "^3.13.1",
         "minimatch": "^3.0.4",
+        "mkdirp": "^0.5.1",
         "resolve": "^1.3.2",
         "semver": "^5.3.0",
         "tslib": "^1.8.0",
-        "tsutils": "^2.27.2"
+        "tsutils": "^2.29.0"
       }
     },
     "tsutils": {
@@ -7485,7 +7448,7 @@
         },
         "chalk": {
           "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "requires": {
diff --git a/package.json b/package.json
index 9f896be..a882159 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "ts-jest": "^24.0.2",
     "ts-loader": "^6.0.4",
     "ts-node": "^8.3.0",
-    "tslint": "^5.11.0",
+    "tslint": "^5.18.0",
     "typescript": "^3.0.3"
   },
   "dependencies": {
diff --git a/src/commander.ts b/src/commander.ts
index 4230230..d0ec5ad 100644
--- a/src/commander.ts
+++ b/src/commander.ts
@@ -73,14 +73,14 @@ function getParams(
 }
 
 function instantiateCommand(command: CommandDefinition<any>) {
-  const constructor = command.type as { new(...args: any[]): Command<any> };
+  const constructor = command.type;
   const instance = iocContainer ? iocContainer.get(constructor) : new constructor();
   return instance;
 }
 
 function registerCommandOption(
   cliCommand: cli.Command,
-  paramsClass: { new(...args: any[]): any; },
+  paramsClass: new (...args: any[]) => any,
   option: CommandOptionDefinition
 ) {
   const optionUsage = getOptionUsage(option);
diff --git a/src/types.ts b/src/types.ts
index 257ad02..b11d67a 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -30,14 +30,10 @@ export interface Command<TParams> {
   execute(params: TParams): Promise<void> | void;
 }
 
-export interface CommandParamsClass<T> {
-  new(): T;
-}
+export type CommandParamsClass<T> = new () => T;
 
-export interface CommandClass<TParams> {
-  new(...args: any[]): Command<TParams>;
-}
+export type CommandClass<TParams> = new (...args: any[]) => Command<TParams>;
 
 export interface IocContainer {
-  get: <T>(Class: { new(...args: any[]): T }) => T;
+  get: <T>(Class: new (...args: any[]) => T) => T;
 }