diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..001a49c
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,31 @@
+/**
+ * Resolve a relative path against `process.cwd()` (the process's current working directory) and return an absolute path. This will throw if the resulting resolution seems malicious. The following are malicious:
+ *
+ * - The relative path is an absolute path
+ * - The relative path contains a NULL byte
+ * - The relative path resolves to a path outside of `process.cwd()`
+ * - The relative path traverses above `process.cwd()` and back down
+ *
+ * @param {string} relativePath
+ * @return {string}
+ */
+declare function resolvePath(relativePath: string): string;
+
+/**
+ * Resolve a relative path against the provided root path and return an absolute path. This will throw if the resulting resolution seems malicious. The following are malicious:
+ *
+ * - The relative path is an absolute path
+ * - The relative path contains a NULL byte
+ * - The relative path resolves to a path outside of the root path
+ * - The relative path traverses above the root and back down
+ *
+ * @param {string} rootPath
+ * @param {string} relativePath
+ * @return {string}
+ */
+declare function resolvePath(rootPath: string, relativePath: string): string;
+
+declare namespace resolvePath {
+}
+
+export = resolvePath;
diff --git a/package.json b/package.json
index bb35698..3c1ed8b 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,8 @@
     "HISTORY.md",
     "LICENSE",
     "README.md",
-    "index.js"
+    "index.js",
+    "index.d.ts"
   ],
   "engines": {
     "node": ">= 0.8"
@@ -42,5 +43,6 @@
     "resolve",
     "path",
     "safe"
-  ]
+  ],
+  "typings": "index.d.ts"
 }