diff --git a/lib/main.js b/lib/main.js
index 0f6e55c..96a0b00 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -55,7 +55,7 @@ export default class SinkMemory extends Sink {
 				return;
 			}
 
-			const pathname = join(this._rootPath, filePath);
+			const pathname = join(this._rootPath, filePath).replace(/\\/g, "/");
 
 			if (pathname.indexOf(this._rootPath) !== 0) {
 				reject(new Error(`Directory traversal - ${filePath}`));
@@ -109,7 +109,7 @@ export default class SinkMemory extends Sink {
 				return;
 			}
 
-			const pathname = join(this._rootPath, filePath);
+			const pathname = join(this._rootPath, filePath).replace(/\\/g, "/");
 
 			if (pathname.indexOf(this._rootPath) !== 0) {
 				this._counter.inc({ labels: { operation } });
@@ -168,7 +168,7 @@ export default class SinkMemory extends Sink {
 				return;
 			}
 
-			const pathname = join(this._rootPath, filePath);
+			const pathname = join(this._rootPath, filePath).replace(/\\/g, "/");
 
 			if (pathname.indexOf(this._rootPath) !== 0) {
 				this._counter.inc({ labels: { operation } });
@@ -212,7 +212,7 @@ export default class SinkMemory extends Sink {
 				return;
 			}
 
-			const pathname = join(this._rootPath, filePath);
+			const pathname = join(this._rootPath, filePath).replace(/\\/g, "/");
 
 			if (pathname.indexOf(this._rootPath) !== 0) {
 				this._counter.inc({ labels: { operation } });