diff --git a/spec/PKPass.ts b/spec/PKPass.ts
index 7adce68..ffc6751 100644
--- a/spec/PKPass.ts
+++ b/spec/PKPass.ts
@@ -833,6 +833,16 @@ describe("PKPass", () => {
 			expect(pass[filesSymbol]["en.lproj/pass.string"]).toBeUndefined();
 			expect(pass[localizationSymbol]["en"]).toBeUndefined();
 		});
+
+		it("should convert Windows paths to single UNIX slash", () => {
+			if (path.sep === "\\") {
+				pass.addBuffer("en.lproj\\icon@2x.png", Buffer.alloc(0));
+
+				expect(pass[filesSymbol]).toContain({
+					"en.lproj/icon@2x.png": Buffer.alloc(0),
+				});
+			}
+		});
 	});
 
 	describe("[importMetadataSymbol]", () => {
diff --git a/src/PKPass.ts b/src/PKPass.ts
index 75593ef..f7d5945 100644
--- a/src/PKPass.ts
+++ b/src/PKPass.ts
@@ -1,4 +1,5 @@
 import { Stream } from "stream";
+import path from "path";
 import FieldsArray from "./FieldsArray";
 import Bundle, { filesSymbol } from "./Bundle";
 import getModelFolderContents from "./getModelFolderContents";
@@ -435,6 +436,13 @@ export default class PKPass extends Bundle {
 			return super.addBuffer(pathName, buffer);
 		}
 
+		/**
+		 * Converting Windows path to Unix path
+		 * @example de.lproj\\icon.png => de.lproj/icon.png
+		 */
+
+		const normalizedPathName = pathName.replace(path.sep, "/");
+
 		/**
 		 * If a new pass.strings file is added, we want to
 		 * prevent it from being merged and, instead, save
@@ -446,7 +454,7 @@ export default class PKPass extends Bundle {
 
 		let match: RegExpMatchArray | null;
 
-		if ((match = pathName.match(translationsFileRegexp))) {
+		if ((match = normalizedPathName.match(translationsFileRegexp))) {
 			const [, lang] = match;
 
 			const parsedTranslations = Strings.parse(buffer).translations;
@@ -460,7 +468,7 @@ export default class PKPass extends Bundle {
 			return;
 		}
 
-		return super.addBuffer(pathName, buffer);
+		return super.addBuffer(normalizedPathName, buffer);
 	}
 
 	/**