diff --git a/pofile.d.ts b/pofile.d.ts
index 0438cf2..dd61731 100644
--- a/pofile.d.ts
+++ b/pofile.d.ts
@@ -1,44 +1,45 @@
-declare module pofile {
-    function parse(data: string): PO;
-    function load(fileName: string, callback: (err: NodeJS.ErrnoException | null, po: PO) => void): void;
-
-    class PO {
-        public comments: string[];
-        public extractedComments: string[];
-        public items: Item[];
-        public headers: Partial<IHeaders>
-
-        public save(filename: string, callback: (err?: NodeJS.ErrnoException) => void): void;
-        public toString(): string;
-    }
-
-    interface IHeaders {
-        'Project-Id-Version': string;
-        'Report-Msgid-Bugs-To': string;
-        'POT-Creation-Date': string;
-        'PO-Revision-Date': string;
-        'Last-Translator': string;
-        'Language': string;
-        'Language-Team': string;
-        'Content-Type': string;
-        'Content-Transfer-Encoding': string;
-        'Plural-Forms': string;
-    }
-
-    class Item {
-        public msgid: string;
-        public msgctxt?: string;
-        public references: string[];
-        public msgid_plural?: string;
-        public msgstr: string[];
-        public comments: string[];
-        public extractedComments: string[];
-        public flags: { [flag: string]: boolean | undefined }
-        private nplurals: number;
-        private obsolete: boolean;
-
-        public toString(): string;
-    }
+declare interface IHeaders {
+    'Project-Id-Version': string;
+    'Report-Msgid-Bugs-To': string;
+    'POT-Creation-Date': string;
+    'PO-Revision-Date': string;
+    'Last-Translator': string;
+    'Language': string;
+    'Language-Team': string;
+    'Content-Type': string;
+    'Content-Transfer-Encoding': string;
+    'Plural-Forms': string;
+    [name: string]: string;
 }
 
-export = pofile
+declare class Item {
+    public msgid: string;
+    public msgctxt?: string;
+    public references: string[];
+    public msgid_plural?: string;
+    public msgstr: string[];
+    public comments: string[];
+    public extractedComments: string[];
+    public flags: Record<string, boolean | undefined>;
+    private nplurals: number;
+    private obsolete: boolean;
+
+    public toString(): string;
+}
+
+declare class PO {
+    public comments: string[];
+    public extractedComments: string[];
+    public items: Item[];
+    public headers: Partial<IHeaders>
+
+    public static parse(data: string): PO;
+    public static parsePluralForms(forms: string): PO;
+    public static load(fileName: string, callback: (err: NodeJS.ErrnoException, po: PO) => void): void;
+    public static Item: typeof Item;
+
+    public save(fileName: string, callback: (err: NodeJS.ErrnoException) => void): void;
+    public toString(): string;
+}
+
+export = PO