diff --git a/types/kms-json/index.d.ts b/types/kms-json/index.d.ts
new file mode 100644
index 0000000000..b7a7881f85
--- /dev/null
+++ b/types/kms-json/index.d.ts
@@ -0,0 +1,22 @@
+// Type definitions for kms-json 1.1
+// Project: https://github.com/AlexanderMS/kms-json
+// Definitions by: Yoichi Imai <https://github.com/sunnyone>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+// TypeScript Version: 2.2
+
+declare namespace KmsJson {
+    interface KmsJsonOptions {
+        awsKmsSettings?: object;
+        keyId: string;
+        encoding?: string;
+    }
+}
+
+declare class KmsJson {
+    constructor(options: KmsJson.KmsJsonOptions);
+    encrypt(inputJson: object): string;
+    decrypt(cipherText: string): object;
+}
+
+export = KmsJson;
diff --git a/types/kms-json/kms-json-tests.ts b/types/kms-json/kms-json-tests.ts
new file mode 100644
index 0000000000..d9825f949c
--- /dev/null
+++ b/types/kms-json/kms-json-tests.ts
@@ -0,0 +1,10 @@
+import KmsJson = require('kms-json');
+
+const kmsJson = new KmsJson({
+    awsKmsSettings: { },
+    keyId: "foo",
+    encoding: "base64"
+});
+
+kmsJson.encrypt({ abc: 123 });
+kmsJson.decrypt("bar");
diff --git a/types/kms-json/tsconfig.json b/types/kms-json/tsconfig.json
new file mode 100644
index 0000000000..f8ac8d1921
--- /dev/null
+++ b/types/kms-json/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "kms-json-tests.ts"
+    ]
+}
diff --git a/types/kms-json/tslint.json b/types/kms-json/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/kms-json/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }