diff --git a/package-lock.json b/package-lock.json
index 54c7294..7ab1c22 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9791,16 +9791,16 @@
       "integrity": "sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ=="
     },
     "tslint": {
-      "version": "5.18.0",
-      "resolved": "https://registry.npmjs.org/tslint/-/tslint-5.18.0.tgz",
-      "integrity": "sha512-Q3kXkuDEijQ37nXZZLKErssQVnwCV/+23gFEMROi8IlbaBG6tXqLPQJ5Wjcyt/yHPKBC+hD5SzuGaMora+ZS6w==",
+      "version": "5.20.1",
+      "resolved": "https://registry.npmjs.org/tslint/-/tslint-5.20.1.tgz",
+      "integrity": "sha512-EcMxhzCFt8k+/UP5r8waCf/lzmeSyVlqxqMEDQE7rWYiQky8KpIBz1JAoYXfROHrPZ1XXd43q8yQnULOLiBRQg==",
       "dev": true,
       "requires": {
         "@babel/code-frame": "^7.0.0",
         "builtin-modules": "^1.1.1",
         "chalk": "^2.3.0",
         "commander": "^2.12.1",
-        "diff": "^3.2.0",
+        "diff": "^4.0.1",
         "glob": "^7.1.1",
         "js-yaml": "^3.13.1",
         "minimatch": "^3.0.4",
@@ -9811,6 +9811,12 @@
         "tsutils": "^2.29.0"
       },
       "dependencies": {
+        "diff": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/diff/-/diff-4.0.1.tgz",
+          "integrity": "sha512-s2+XdvhPCOF01LRQBC8hf4vhbVmI2CGS5aZnxLJlT5FtdhPCDFq80q++zK2KlrVorVDdL5BOGZ/VfLrVtYNF+Q==",
+          "dev": true
+        },
         "js-yaml": {
           "version": "3.13.1",
           "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
diff --git a/package.json b/package.json
index dd49b22..b02e237 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "prettier": "~1.18.2",
     "protractor": "5.4.2",
     "ts-node": "8.0.2",
-    "tslint": "5.18.0",
+    "tslint": "5.20.1",
     "typescript": "3.4.5"
   }
 }