diff --git a/types/pako/index.d.ts b/types/pako/index.d.ts
index 69c4feaf01..a91c240fe8 100644
--- a/types/pako/index.d.ts
+++ b/types/pako/index.d.ts
@@ -123,8 +123,19 @@ declare namespace Pako {
     function ungzip(data: Data, options: InflateFunctionOptions & { to: 'string' }): string;
     function ungzip(data: Data, options?: InflateFunctionOptions): Uint8Array;
 
+    // https://github.com/nodeca/pako/blob/893381abcafa10fa2081ce60dae7d4d8e873a658/lib/deflate.js
     class Deflate {
         constructor(options?: DeflateOptions);
+        level?: -1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
+        windowBits?: number;
+        memLevel?: number;
+        strategy?: StrategyValues;
+        dictionary?: any;
+        raw?: boolean;
+        to?: 'string';
+        chunkSize?: number;
+        gzip?: boolean;
+        header?: Header;
         err: ReturnCodes;
         msg: string;
         result: Uint8Array | number[];
@@ -133,11 +144,18 @@ declare namespace Pako {
         push(data: Data | ArrayBuffer, mode?: FlushValues | boolean): boolean;
     }
 
+    // https://github.com/nodeca/pako/blob/893381abcafa10fa2081ce60dae7d4d8e873a658/lib/inflate.js
     class Inflate {
         constructor(options?: InflateOptions);
+        windowBits?: number;
+        dictionary?: any;
+        raw?: boolean;
+        to?: 'string';
+        chunkSize?: number;
         err: ReturnCodes;
         msg: string;
         result: Data;
+        header: Header;
         onData(chunk: Data): void;
         onEnd(status: number): void;
         push(data: Data | ArrayBuffer, mode?: FlushValues | boolean): boolean;
diff --git a/types/pako/pako-tests.ts b/types/pako/pako-tests.ts
index 9caa562e53..b77bcfb69f 100644
--- a/types/pako/pako-tests.ts
+++ b/types/pako/pako-tests.ts
@@ -1,14 +1,17 @@
 import pako = require("pako");
+import * as assert from "assert";
 
 const chunk1 = new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8, 9]);
 const chunk2 = new Uint8Array([10, 11, 12, 13, 14, 15, 16, 17, 18, 19]);
+const chunk3 = new Uint8Array([101, 111, 121, 131, 141, 151, 161, 171, 181, 191]);
 
-const deflate = new pako.Deflate({level: 3});
+const deflate = new pako.Deflate({level: 3, strategy : pako.StrategyValues.Z_HUFFMAN_ONLY});
 
 deflate.push(chunk1, false);
+deflate.push(chunk3, pako.FlushValues.Z_PARTIAL_FLUSH);
 deflate.push(chunk2, true);  // true -> last chunk
 
-if (deflate.err) {
+if (deflate.err !== pako.ReturnCodes.Z_OK) {
     throw new Error(deflate.err.toString());
 }
 
@@ -19,3 +22,29 @@ const arr: Uint8Array = pako.deflate('1234');
 
 const str2: string = pako.inflate('1234', {to: 'string'});
 const arr2: Uint8Array = pako.inflate('1234');
+
+const data = '           ';
+
+const deflator = new pako.Deflate({
+    gzip: true,
+    header: {
+        hcrc: true,
+        time: 1234567,
+        os: 15,
+        name: 'test name',
+        comment: 'test comment',
+        extra: [ 4, 5, 6 ]
+    }
+});
+deflator.push(data, true);
+
+const inflator = new pako.Inflate({ to: 'string' });
+inflator.push(deflator.result, true);
+
+assert.equal(inflator.err, 0);
+assert.equal(inflator.result, data);
+
+const header = inflator.header;
+assert.equal(header.time, 1234567);
+assert.equal(header.os, 15);
+assert.equal(header.name, 'test name');
diff --git a/types/pako/tsconfig.json b/types/pako/tsconfig.json
index 011a39c83c..4b4abb5711 100644
--- a/types/pako/tsconfig.json
+++ b/types/pako/tsconfig.json
@@ -21,4 +21,4 @@
         "index.d.ts",
         "pako-tests.ts"
     ]
-}
\ No newline at end of file
+}