diff --git a/package.json b/package.json
index 3f62f94f3..635d76ee1 100644
--- a/package.json
+++ b/package.json
@@ -91,7 +91,7 @@
     "shx": "^0.2.1",
     "ts-jest": "^18.0.1",
     "ts-node": "^2.0.0",
-    "tslint": "^4.2.0",
+    "tslint": "^4.4.0",
     "typescript": "^2.1.4"
   },
   "dependencies": {
diff --git a/source/commands/danger-pr.ts b/source/commands/danger-pr.ts
index 64a98b976..001c2da1d 100644
--- a/source/commands/danger-pr.ts
+++ b/source/commands/danger-pr.ts
@@ -27,7 +27,7 @@ if (program.args.length === 0) {
     console.error("Could not get a repo and a PR number from your URL, bad copy & paste?")
     process.exitCode = 1
   } else {
-    // TODO: Use custom `fetch` in GitHub that stores and uses local cache if PR is closed, these PRs 
+    // TODO: Use custom `fetch` in GitHub that stores and uses local cache if PR is closed, these PRs
     //       shouldn't change often and there is a limit on API calls per hour.
 
     if (validateDangerfileExists(dangerFile)) {
diff --git a/source/commands/danger-run.ts b/source/commands/danger-run.ts
index 34d848b99..ae7068c4b 100755
--- a/source/commands/danger-run.ts
+++ b/source/commands/danger-run.ts
@@ -8,7 +8,7 @@ import {Executor} from "../runner/Executor"
 const d = debug("danger:run")
 declare const global: any
 
-// TODO: if we get more options around the dangerfile, we should 
+// TODO: if we get more options around the dangerfile, we should
 //       support sharing `program` setup code with danger-pr.ts
 
 program
diff --git a/source/runner/DangerfileRunner.ts b/source/runner/DangerfileRunner.ts
index 1909e335e..8d2831a5b 100644
--- a/source/runner/DangerfileRunner.ts
+++ b/source/runner/DangerfileRunner.ts
@@ -80,12 +80,12 @@ export async function runDangerfileEnvironment(filename: Path, environment: Dang
  * Passes in a dangerfile path, will remove any references to import/require `danger`
  * then runs the internal closure with a "safe" version of the Dangerfile.
  * Then it will clean itself up afterwards, and use the new version.
- * 
+ *
  * Note: We check for equality to not trigger the jest watcher for tests.
  *
  * @param {string} filename the file path for the dangerfile
  * @param {Function} closure code to run with a cleaned Dangerfile
- * @returns {void} 
+ * @returns {void}
  */
 function ensureCleanDangerfile(filename: string, closure: Function) {
   const originalContents = fs.readFileSync(filename).toString()
diff --git a/yarn.lock b/yarn.lock
index 3e3947084..ee2de043d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3542,7 +3542,7 @@ spdx-license-ids@^1.0.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/spdx-license-ids/-/spdx-license-ids-1.2.2.tgz#c9df7a3424594ade6bd11900d596696dc06bac57"
 
-sprintf-js@^1.0.3, sprintf-js@~1.0.2:
+sprintf-js@~1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
 
@@ -3789,9 +3789,9 @@ tsconfig@^5.0.2:
     strip-bom "^2.0.0"
     strip-json-comments "^2.0.0"
 
-tslint@^4.2.0:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/tslint/-/tslint-4.2.0.tgz#b9f5c5b871b784ab2f4809e704ade42d62f523ad"
+tslint@^4.4.0:
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/tslint/-/tslint-4.4.0.tgz#748d17bf8598dd044cca5771a03353ea422da29e"
   dependencies:
     babel-code-frame "^6.20.0"
     colors "^1.1.2"
@@ -3800,7 +3800,6 @@ tslint@^4.2.0:
     glob "^7.1.1"
     optimist "~0.6.0"
     resolve "^1.1.7"
-    underscore.string "^3.3.4"
     update-notifier "^1.0.2"
 
 tunnel-agent@~0.4.1:
@@ -3838,13 +3837,6 @@ uid-number@~0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/uid-number/-/uid-number-0.0.6.tgz#0ea10e8035e8eb5b8e4449f06da1c730663baa81"
 
-underscore.string@^3.3.4:
-  version "3.3.4"
-  resolved "https://registry.yarnpkg.com/underscore.string/-/underscore.string-3.3.4.tgz#2c2a3f9f83e64762fdc45e6ceac65142864213db"
-  dependencies:
-    sprintf-js "^1.0.3"
-    util-deprecate "^1.0.2"
-
 unzip-response@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/unzip-response/-/unzip-response-1.0.2.tgz#b984f0877fc0a89c2c773cc1ef7b5b232b5b06fe"
@@ -3872,7 +3864,7 @@ user-home@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/user-home/-/user-home-1.1.1.tgz#2b5be23a32b63a7c9deb8d0f28d485724a3df190"
 
-util-deprecate@^1.0.2, util-deprecate@~1.0.1:
+util-deprecate@~1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"