diff --git a/electrode-ota-server-util-dev/package.json b/electrode-ota-server-util-dev/package.json
index 5a8ca22e..065b266f 100644
--- a/electrode-ota-server-util-dev/package.json
+++ b/electrode-ota-server-util-dev/package.json
@@ -27,7 +27,7 @@
     "sinon": "^7.4.1",
     "source-map-support": "^0.4.16",
     "ts-node": "^3.3.0",
-    "tslint": "^5.6.0",
+    "tslint": "^5.20.1",
     "typescript": "2.4.2"
   },
   "scripts": {
diff --git a/electrode-ota-server-util-dev/yarn.lock b/electrode-ota-server-util-dev/yarn.lock
index 9a86d4eb..50958723 100644
--- a/electrode-ota-server-util-dev/yarn.lock
+++ b/electrode-ota-server-util-dev/yarn.lock
@@ -4032,10 +4032,10 @@ tslib@^1.8.0, tslib@^1.8.1:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.10.0.tgz#c3c19f95973fb0a62973fb09d90d961ee43e5c8a"
   integrity sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==
 
-tslint@^5.6.0:
-  version "5.20.0"
-  resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.20.0.tgz#fac93bfa79568a5a24e7be9cdde5e02b02d00ec1"
-  integrity sha512-2vqIvkMHbnx8acMogAERQ/IuINOq6DFqgF8/VDvhEkBqQh/x6SP0Y+OHnKth9/ZcHQSroOZwUQSN18v8KKF0/g==
+tslint@^5.20.1:
+  version "5.20.1"
+  resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.20.1.tgz#e401e8aeda0152bc44dd07e614034f3f80c67b7d"
+  integrity sha512-EcMxhzCFt8k+/UP5r8waCf/lzmeSyVlqxqMEDQE7rWYiQky8KpIBz1JAoYXfROHrPZ1XXd43q8yQnULOLiBRQg==
   dependencies:
     "@babel/code-frame" "^7.0.0"
     builtin-modules "^1.1.1"