diff --git a/src/antora-adapter.js b/src/antora-adapter.js
index 8d72471..24a021a 100644
--- a/src/antora-adapter.js
+++ b/src/antora-adapter.js
@@ -1,4 +1,4 @@
-const ospath = require('path')
+const ospath = require('path').posix
 
 module.exports = (file, contentCatalog, vfs) => {
   let baseReadFn
diff --git a/src/fetch.js b/src/fetch.js
index 3565583..861d7e7 100644
--- a/src/fetch.js
+++ b/src/fetch.js
@@ -1,5 +1,5 @@
 const rusha = require('rusha')
-const path = require('path')
+const path = require('path').posix
 
 const getImagesOutputDirectory = (doc) => {
   const imagesOutputDir = doc.getAttribute('imagesoutdir')
diff --git a/src/preprocess.js b/src/preprocess.js
index 935dcab..7f96272 100644
--- a/src/preprocess.js
+++ b/src/preprocess.js
@@ -1,7 +1,7 @@
 // @ts-check
 // The previous line must be the first non-comment line in the file to enable TypeScript checks:
 // https://www.typescriptlang.org/docs/handbook/intro-to-js-ts.html#ts-check
-const path = require('path')
+const path = require('path').posix
 
 /**
  * @param {string} diagramText