diff --git a/is-alphanumerical/index.d.ts b/is-alphanumerical/index.d.ts
new file mode 100644
index 0000000000..940a005b08
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+++ b/is-alphanumerical/index.d.ts
@@ -0,0 +1,7 @@
+// Type definitions for is-alphanumerical 1.0
+// Project: https://github.com/wooorm/is-alphanumerical/
+// Definitions by: Vu Tran <https://github.com/vutran>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare function isAlphanumerical(val: string | boolean | number): boolean;
+export = isAlphanumerical;
diff --git a/is-alphanumerical/is-alphanumerical-tests.ts b/is-alphanumerical/is-alphanumerical-tests.ts
new file mode 100644
index 0000000000..3d6602c6df
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+++ b/is-alphanumerical/is-alphanumerical-tests.ts
@@ -0,0 +1,7 @@
+import isAlphanumerical = require('is-alphanumerical');
+
+isAlphanumerical('a');
+isAlphanumerical('z');
+isAlphanumerical('0');
+isAlphanumerical('9');
+isAlphanumerical('💩');
diff --git a/is-alphanumerical/tsconfig.json b/is-alphanumerical/tsconfig.json
new file mode 100644
index 0000000000..481957289e
--- /dev/null
+++ b/is-alphanumerical/tsconfig.json
@@ -0,0 +1,22 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "is-alphanumerical-tests.ts"
+    ]
+}
diff --git a/is-alphanumerical/tslint.json b/is-alphanumerical/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/is-alphanumerical/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }