diff --git a/package.json b/package.json
index 033c3e8..e11d144 100644
--- a/package.json
+++ b/package.json
@@ -44,8 +44,8 @@
     "lint": "tslint -c tslint.json \"src/**/*.ts\""
   },
   "devDependencies": {
-    "tslint": "^3.15.1",
-    "typescript": "^2.0.3",
+    "tslint": "^4.2.0",
+    "typescript": "^2.1.4",
     "typings": "^2.0.0",
     "vsce": "^1.8.1",
     "vscode": "^1.0.0"
diff --git a/tsconfig.json b/tsconfig.json
index d4a4dcf..086e5c7 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,6 +13,9 @@
     "strictNullChecks": true,
     "noImplicitThis": true,
     "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "allowUnreachableCode": false,
+    "allowUnusedLabels": false,
     "typeRoots": [
       "typings/modules",
       "typings/globals"
diff --git a/tslint.json b/tslint.json
index c12f024..49a522d 100644
--- a/tslint.json
+++ b/tslint.json
@@ -3,7 +3,6 @@
     "class-name": true,
     "comment-format": [true, "check-space"],
     "indent": [true, "spaces"],
-    "no-duplicate-variable": true,
     "no-eval": true,
     "no-internal-module": true,
     "no-trailing-whitespace": true,
@@ -36,10 +35,7 @@
     "one-variable-per-declaration": [true, "ignore-for-loop"],
     "curly": true,
     "no-empty": true,
-    "no-duplicate-key": true,
-    "no-unreachable": true,
     "no-unused-expression": true,
-    "no-unused-variable": [true],
     "eofline": true,
     "trailing-comma": [true, {"singleline": "never", "multiline": "never"}],
     "align": [true, "parameters", "statements"]