diff --git a/src/package/index.js b/src/package/index.js
index 87ee4a2..403b14a 100644
--- a/src/package/index.js
+++ b/src/package/index.js
@@ -144,7 +144,7 @@ class Package {
         paths.push(...['./browser-', './node-'].map(n => n + rel.slice(2)))
       }
     }
-    const code = paths.map(p => `import("${p}")`).join('\n')
+    const code = paths.map(p => `import("${p.replace(/\\/g, '/')}")`).join('\n')
     const input = new URL(dist + '/esm/_ipjsInput.js')
     await writeFile(input, code)
     const onwarn = warning => {
diff --git a/src/path-to-url.js b/src/path-to-url.js
index f582e51..d0f0a4e 100644
--- a/src/path-to-url.js
+++ b/src/path-to-url.js
@@ -1,7 +1,6 @@
 // adapted from https://nodejs.org/api/path.html#path_path_resolve_paths
 const CHAR_FORWARD_SLASH = '/'
 const percentRegEx = /%/g
-const backslashRegEx = /\\/g
 const newlineRegEx = /\n/g
 const carriageReturnRegEx = /\r/g
 const tabRegEx = /\t/g
@@ -18,8 +17,6 @@ export default (filepath, cwd) => {
       resolved[resolved.length - 1] !== '/') { resolved += '/' }
   const outURL = new URL('file://')
   if (resolved.includes('%')) { resolved = resolved.replace(percentRegEx, '%25') }
-  // In posix, "/" is a valid character in paths
-  if (resolved.includes('\\')) { resolved = resolved.replace(backslashRegEx, '%5C') }
   if (resolved.includes('\n')) { resolved = resolved.replace(newlineRegEx, '%0A') }
   if (resolved.includes('\r')) { resolved = resolved.replace(carriageReturnRegEx, '%0D') }
   if (resolved.includes('\t')) { resolved = resolved.replace(tabRegEx, '%09') }