diff --git a/package.json b/package.json
index 071165d..2976c02 100644
--- a/package.json
+++ b/package.json
@@ -22,9 +22,13 @@
     "@types/request": "2.0.0",
     "jest": "20.0.4",
     "jest-playback": "1.0.0",
+    "prettier": "1.5.3",
+    "prettier-config-ikatyang": "1.1.1",
     "ts-jest": "20.0.7",
     "tslint": "5.5.0",
-    "tslint-config-ikatyang": "2.0.1",
+    "tslint-config-ikatyang": "2.1.0",
+    "tslint-config-prettier-ext": "1.3.0",
+    "tslint-plugin-prettier": "1.0.0",
     "typescript": "2.4.2"
   }
 }
diff --git a/tslint.json b/tslint.json
index 8fea16e..a1d4426 100644
--- a/tslint.json
+++ b/tslint.json
@@ -1,3 +1,8 @@
 {
-  "extends": "tslint-config-ikatyang"
+  "extends": [
+    "tslint-config-ikatyang",
+    "tslint-config-prettier-ext",
+    "tslint-plugin-prettier",
+    "prettier-config-ikatyang/tslint"
+  ]
 }
diff --git a/yarn.lock b/yarn.lock
index 863b695..0b9804b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -55,12 +55,6 @@
   version "8.0.17"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-8.0.17.tgz#677bc8c118cfb76013febb62ede1f31d2c7222a1"
 
-"@types/prettier@^1.5.0":
-  version "1.5.0"
-  resolved "https://registry.yarnpkg.com/@types/prettier/-/prettier-1.5.0.tgz#35ed47a24bd92bcab439c3670742219499a6b717"
-  dependencies:
-    "@types/babel-types" "*"
-
 "@types/request@2.0.0":
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/@types/request/-/request-2.0.0.tgz#7d6fd2a1ef48ad07d0e3333471b8267156d707a4"
@@ -1952,13 +1946,11 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-prettier-config-ikatyang@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/prettier-config-ikatyang/-/prettier-config-ikatyang-1.0.0.tgz#02f445dd875abc35a5a38c6c7d8d43172781f304"
-  dependencies:
-    "@types/prettier" "^1.5.0"
+prettier-config-ikatyang@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/prettier-config-ikatyang/-/prettier-config-ikatyang-1.1.1.tgz#9ccab4bc2d441e4c68b58dbe8f1a4e18213c3f2d"
 
-prettier@^1.5.3:
+prettier@1.5.3:
   version "1.5.3"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.5.3.tgz#59dadc683345ec6b88f88b94ed4ae7e1da394bfe"
 
@@ -2363,19 +2355,15 @@ tslib@^1.0.0, tslib@^1.7.1:
   version "1.7.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.7.1.tgz#bc8004164691923a79fe8378bbeb3da2017538ec"
 
-tslint-config-ikatyang@2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/tslint-config-ikatyang/-/tslint-config-ikatyang-2.0.1.tgz#ce7374ca07169daf90ae8ab4b2ec6d67a4d70db3"
+tslint-config-ikatyang@2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/tslint-config-ikatyang/-/tslint-config-ikatyang-2.1.0.tgz#8b3b8f615004bc2f6cd4d7cca151c2ad04570e69"
   dependencies:
-    prettier "^1.5.3"
-    prettier-config-ikatyang "^1.0.0"
-    tslint-config-prettier-ext "^1.2.0"
     tslint-consistent-codestyle "~1.6.0"
     tslint-eslint-rules "~4.1.0"
     tslint-plugin-ikatyang "~1.0.0"
-    tslint-plugin-prettier "~1.0.0"
 
-tslint-config-prettier-ext@^1.2.0:
+tslint-config-prettier-ext@1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/tslint-config-prettier-ext/-/tslint-config-prettier-ext-1.3.0.tgz#501437366b90be5a05478123ac78965e5a38287a"
 
@@ -2405,7 +2393,7 @@ tslint-plugin-ikatyang@~1.0.0:
     tslib "^1.7.1"
     tsutils "^2.8.0"
 
-tslint-plugin-prettier@~1.0.0:
+tslint-plugin-prettier@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/tslint-plugin-prettier/-/tslint-plugin-prettier-1.0.0.tgz#2138ec2a65de883d19b95247430771cdfcbff8de"
   dependencies: