diff --git a/package.json b/package.json
index 2f4ff08..8e40291 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "jest-playback": "1.0.1",
     "prettier": "1.7.4",
     "prettier-config-ikatyang": "1.1.1",
-    "ts-jest": "21.1.4",
+    "ts-jest": "21.2.1",
     "ts-node": "3.3.0",
     "tslint": "5.8.0",
     "tslint-config-ikatyang": "2.5.1",
diff --git a/yarn.lock b/yarn.lock
index 70b4220..3e52736 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2673,9 +2673,9 @@ trim-right@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/trim-right/-/trim-right-1.0.1.tgz#cb2e1203067e0c8de1f614094b9fe45704ea6003"
 
-ts-jest@21.1.4:
-  version "21.1.4"
-  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-21.1.4.tgz#6b720cd4ebfacbc935468e60dd395392f817095b"
+ts-jest@21.2.1:
+  version "21.2.1"
+  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-21.2.1.tgz#cc98f4ed432c8f650940b5090a2efef365693fd0"
   dependencies:
     babel-core "^6.24.1"
     babel-plugin-istanbul "^4.1.4"