diff --git a/package-lock.json b/package-lock.json
index 4476104b..1c23e693 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,16 +14,15 @@
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@@ -1357,6 +1417,163 @@
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@@ -6788,12 +6903,12 @@
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@@ -6873,10 +6988,15 @@
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@@ -6890,12 +7010,55 @@
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+              "dev": true,
+              "requires": {
+                "ansi-regex": "^4.1.0"
+              }
+            }
+          }
+        },
         "yaml": {
-          "version": "1.6.0",
+          "version": "1.7.1",
           "bundled": true,
           "dev": true,
           "requires": {
-            "@babel/runtime": "^7.4.5"
+            "@babel/runtime": "^7.5.5"
           }
         },
         "yoga-layout-prebuilt": {
@@ -6906,9 +7069,9 @@
       }
     },
     "tap-mocha-reporter": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/tap-mocha-reporter/-/tap-mocha-reporter-4.0.1.tgz",
-      "integrity": "sha512-/KfXaaYeSPn8qBi5Be8WSIP3iKV83s2uj2vzImJAXmjNu22kzqZ+1Dv1riYWa53sPCiyo1R1w1jbJrftF8SpcQ==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/tap-mocha-reporter/-/tap-mocha-reporter-5.0.0.tgz",
+      "integrity": "sha512-8HlAtdmYGlDZuW83QbF/dc46L7cN+AGhLZcanX3I9ILvxUAl+G2/mtucNPSXecTlG/4iP1hv6oMo0tMhkn3Tsw==",
       "dev": true,
       "requires": {
         "color-support": "^1.1.0",
@@ -6917,8 +7080,8 @@
         "escape-string-regexp": "^1.0.3",
         "glob": "^7.0.5",
         "readable-stream": "^2.1.5",
-        "tap-parser": "^8.0.0",
-        "tap-yaml": "0 || 1",
+        "tap-parser": "^10.0.0",
+        "tap-yaml": "^1.0.0",
         "unicode-length": "^1.0.0"
       },
       "dependencies": {
@@ -6940,14 +7103,14 @@
       }
     },
     "tap-parser": {
-      "version": "8.1.0",
-      "resolved": "https://registry.npmjs.org/tap-parser/-/tap-parser-8.1.0.tgz",
-      "integrity": "sha512-GgOzgDwThYLxhVR83RbS1JUR1TxcT+jfZsrETgPAvFdr12lUOnuvrHOBaUQgpkAp6ZyeW6r2Nwd91t88M0ru3w==",
+      "version": "10.0.0",
+      "resolved": "https://registry.npmjs.org/tap-parser/-/tap-parser-10.0.0.tgz",
+      "integrity": "sha512-kzeUPvVoSyovAlYvN8m8eajjh1LAJpGn8C3hVIbq7TDW6FDzuH09egdJZMczG4bDdc7+uQSqOlin+XKRLtHbeA==",
       "dev": true,
       "requires": {
         "events-to-array": "^1.0.1",
-        "minipass": "^2.2.0",
-        "tap-yaml": "0 || 1"
+        "minipass": "^3.0.0",
+        "tap-yaml": "^1.0.0"
       }
     },
     "tap-yaml": {
@@ -7023,9 +7186,9 @@
           }
         },
         "p-limit": {
-          "version": "2.2.0",
-          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.2.0.tgz",
-          "integrity": "sha512-pZbTJpoUsCzV48Mc9Nh51VbwO0X9cuPFE8gYwx9BTCt9SF8/b7Zljd2fVgOxhIF/HDTKgpVzs+GPhyKfjLLFRQ==",
+          "version": "2.2.1",
+          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.2.1.tgz",
+          "integrity": "sha512-85Tk+90UCVWvbDavCLKPOLC9vvY8OwEX/RtKF+/1OADJMVlFfEHOiMTPVyxg7mk/dKa+ipdHm0OUkTvCpMTuwg==",
           "dev": true,
           "requires": {
             "p-try": "^2.0.0"
@@ -7056,12 +7219,6 @@
             "json-parse-better-errors": "^1.0.1"
           }
         },
-        "path-exists": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
-          "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU=",
-          "dev": true
-        },
         "path-type": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/path-type/-/path-type-3.0.0.tgz",
@@ -7097,12 +7254,6 @@
             "find-up": "^3.0.0",
             "read-pkg": "^3.0.0"
           }
-        },
-        "require-main-filename": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
-          "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
-          "dev": true
         }
       }
     },
@@ -7179,12 +7330,6 @@
       "integrity": "sha1-n5up2e+odkw4dpi8v+sshI8RrbM=",
       "dev": true
     },
-    "trim-right": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/trim-right/-/trim-right-1.0.1.tgz",
-      "integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=",
-      "dev": true
-    },
     "trivial-deferred": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/trivial-deferred/-/trivial-deferred-1.0.1.tgz",
@@ -7192,9 +7337,9 @@
       "dev": true
     },
     "ts-node": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-8.3.0.tgz",
-      "integrity": "sha512-dyNS/RqyVTDcmNM4NIBAeDMpsAdaQ+ojdf0GOLqE6nwJOgzEkdRNzJywhDfwnuvB10oa6NLVG1rUJQCpRN7qoQ==",
+      "version": "8.4.1",
+      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-8.4.1.tgz",
+      "integrity": "sha512-5LpRN+mTiCs7lI5EtbXmF/HfMeCjzt7DH9CZwtkr6SywStrNQC723wG+aOWFiLNn7zT3kD/RnFqi3ZUfr4l5Qw==",
       "dev": true,
       "requires": {
         "arg": "^4.1.0",
@@ -7218,6 +7363,36 @@
       "integrity": "sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==",
       "dev": true
     },
+    "tslint": {
+      "version": "5.14.0",
+      "resolved": "https://registry.npmjs.org/tslint/-/tslint-5.14.0.tgz",
+      "integrity": "sha512-IUla/ieHVnB8Le7LdQFRGlVJid2T/gaJe5VkjzRVSRR6pA2ODYrnfR1hmxi+5+au9l50jBwpbBL34txgv4NnTQ==",
+      "dev": true,
+      "requires": {
+        "babel-code-frame": "^6.22.0",
+        "builtin-modules": "^1.1.1",
+        "chalk": "^2.3.0",
+        "commander": "^2.12.1",
+        "diff": "^3.2.0",
+        "glob": "^7.1.1",
+        "js-yaml": "^3.7.0",
+        "minimatch": "^3.0.4",
+        "mkdirp": "^0.5.1",
+        "resolve": "^1.3.2",
+        "semver": "^5.3.0",
+        "tslib": "^1.8.0",
+        "tsutils": "^2.29.0"
+      }
+    },
+    "tsutils": {
+      "version": "2.29.0",
+      "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-2.29.0.tgz",
+      "integrity": "sha512-g5JVHCIJwzfISaXpXE1qvNalca5Jwob6FjI4AoPlqMusJ6ftFE7IkkFoMhVLRgK+4Kx3gkzb8UZK5t5yTTvEmA==",
+      "dev": true,
+      "requires": {
+        "tslib": "^1.8.1"
+      }
+    },
     "tunnel-agent": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -7270,9 +7445,9 @@
       }
     },
     "typescript": {
-      "version": "3.5.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.5.3.tgz",
-      "integrity": "sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g==",
+      "version": "3.6.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.6.4.tgz",
+      "integrity": "sha512-unoCll1+l+YK4i4F8f22TaNVPRHcD9PA3yCuZ8g5e0qGqlVlJ/8FSateOLLSagn+Yg5+ZwuPkL8LFUc0Jcvksg==",
       "dev": true
     },
     "uglify-js": {
@@ -7312,6 +7487,12 @@
         "strip-ansi": "^3.0.1"
       },
       "dependencies": {
+        "ansi-regex": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+          "dev": true
+        },
         "strip-ansi": {
           "version": "3.0.1",
           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
@@ -7329,6 +7510,12 @@
       "integrity": "sha1-sxxa6CVIRKOoKBVBzisEuGWnNP8=",
       "dev": true
     },
+    "universalify": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
+      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==",
+      "dev": true
+    },
     "uri-js": {
       "version": "4.2.2",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
@@ -7353,9 +7540,9 @@
       "dev": true
     },
     "uuid": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.3.tgz",
+      "integrity": "sha512-pW0No1RGHgzlpHJO1nsVrHKpOEIxkGg1xB+v0ZmdNH5OAeAwzAVrCnI2/6Mtx+Uys6iaylxa+D3g4j63IKKjSQ==",
       "dev": true
     },
     "v8-compile-cache": {
@@ -7431,6 +7618,12 @@
         "strip-ansi": "^3.0.1"
       },
       "dependencies": {
+        "ansi-regex": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+          "dev": true
+        },
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
@@ -7508,12 +7701,12 @@
       "dev": true
     },
     "yaml": {
-      "version": "1.6.0",
-      "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.6.0.tgz",
-      "integrity": "sha512-iZfse3lwrJRoSlfs/9KQ9iIXxs9++RvBFVzAqbbBiFT+giYtyanevreF9r61ZTbGMgWQBxAua3FzJiniiJXWWw==",
+      "version": "1.7.2",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.7.2.tgz",
+      "integrity": "sha512-qXROVp90sb83XtAoqE8bP9RwAkTTZbugRUTm5YeFCBfNRPEp2YzTeqWiz7m5OORHzEvrA/qcGS8hp/E+MMROYw==",
       "dev": true,
       "requires": {
-        "@babel/runtime": "^7.4.5"
+        "@babel/runtime": "^7.6.3"
       }
     },
     "yapool": {
diff --git a/package.json b/package.json
index c3aa6f78..da1118c9 100644
--- a/package.json
+++ b/package.json
@@ -3,11 +3,13 @@
   "version": "8.1.0",
   "description": "Loads environment variables from .env file",
   "main": "lib/main.js",
+  "types": "types",
   "scripts": {
     "flow": "flow",
+    "dtslint": "dtslint types",
     "lint": "standard",
     "postlint": "standard-markdown",
-    "pretest": "npm run lint",
+    "pretest": "npm run lint && npm run dtslint",
     "test": "tap tests/*.js --100",
     "prerelease": "npm test",
     "release": "standard-version"
@@ -29,12 +31,13 @@
   "license": "BSD-2-Clause",
   "devDependencies": {
     "decache": "^4.5.1",
-    "flow-bin": "^0.105.2",
-    "sinon": "^7.4.1",
+    "dtslint": "^0.9.8",
+    "flow-bin": "^0.109.0",
+    "sinon": "^7.5.0",
     "standard": "^13.1.0",
     "standard-markdown": "^5.1.0",
     "standard-version": "^7.0.0",
-    "tap": "^14.6.1"
+    "tap": "^14.7.0"
   },
   "dependencies": {},
   "engines": {
diff --git a/types/index.d.ts b/types/index.d.ts
new file mode 100644
index 00000000..a83184cc
--- /dev/null
+++ b/types/index.d.ts
@@ -0,0 +1,59 @@
+// TypeScript Version: 3.0
+/// <reference types="node" />
+
+export interface DotenvParseOptions {
+  /**
+   * You may turn on logging to help debug why certain keys or values are not being set as you expect.
+   */
+  debug?: boolean;
+}
+
+export interface DotenvParseOutput {
+  [name: string]: string;
+}
+
+/**
+ * Parses a string or buffer in the .env file format into an object.
+ *
+ * @param src - contents to be parsed
+ * @param options - additional options
+ * @returns an object with keys and values based on `src`
+ */
+export function parse(
+  src: string | Buffer,
+  options?: DotenvParseOptions
+): DotenvParseOutput;
+
+export interface DotenvConfigOptions {
+  /**
+   * You may specify a custom path if your file containing environment variables is located elsewhere.
+   */
+  path?: string;
+
+  /**
+   * You may specify the encoding of your file containing environment variables.
+   */
+  encoding?: string;
+
+  /**
+   * You may turn on logging to help debug why certain keys or values are not being set as you expect.
+   */
+  debug?: boolean;
+}
+
+export interface DotenvConfigOutput {
+  error?: Error;
+  parsed?: DotenvParseOutput;
+}
+
+/**
+ * Loads `.env` file contents into {@link https://nodejs.org/api/process.html#process_process_env | `process.env`}.
+ * Example: 'KEY=value' becomes { parsed: { KEY: 'value' } }
+ *
+ * @param options - controls behavior
+ * @returns an object with a `parsed` key if successful or `error` key if an error occurred
+ *
+ */
+export function config(options?: DotenvConfigOptions): DotenvConfigOutput;
+/** @deprecated since v7.0.0 Use config instead. */
+export const load: typeof config;
diff --git a/types/test.ts b/types/test.ts
new file mode 100644
index 00000000..bce09209
--- /dev/null
+++ b/types/test.ts
@@ -0,0 +1,19 @@
+import { config, parse } from "dotenv";
+
+const env = config();
+const dbUrl: string | null =
+  env.error || !env.parsed ? null : env.parsed["BASIC"];
+
+config({
+  path: ".env-example",
+  encoding: "utf8",
+  debug: true
+});
+
+const parsed = parse("NODE_ENV=production\nDB_HOST=a.b.c");
+const dbHost: string = parsed["DB_HOST"];
+
+const parsedFromBuffer = parse(new Buffer("JUSTICE=league\n"), {
+  debug: true
+});
+const justice: string = parsedFromBuffer["JUSTICE"];
diff --git a/types/tsconfig.json b/types/tsconfig.json
new file mode 100644
index 00000000..012b05dd
--- /dev/null
+++ b/types/tsconfig.json
@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "lib": ["es6"],
+    "noImplicitAny": true,
+    "noImplicitThis": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "noEmit": true,
+    "baseUrl": ".",
+    "paths": {
+      "dotenv": ["."]
+    }
+  }
+}
diff --git a/types/tslint.json b/types/tslint.json
new file mode 100644
index 00000000..c634f996
--- /dev/null
+++ b/types/tslint.json
@@ -0,0 +1,6 @@
+{
+  "extends": "dtslint/dtslint.json",
+  "rules": {
+    "strict-export-declare-modifiers": false
+  }
+}