diff --git a/CHANGELOG.md b/CHANGELOG.md
index b636547..b32065a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## 5.0.3
 Task 6.0.3
 - Fix minimum agent requirement to `2.206.1` ([#13](https://github.com/qetza/replacetokens-task/issues/13)).
+- Fix paths in sources incompatible with `fast-glob` syntax on win32 ([#16](https://github.com/qetza/replacetokens-task/issues/16)).
 
 ## 5.0.2
 Task 6.0.2
diff --git a/README.md b/README.md
index 70aa53e..3a72e9e 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,8 @@ Please refer to the [release page](https://github.com/qetza/replacetokens-task/r
 The task was completely rewritten to use the npm package [@qetza/replacetokens](https://www.npmjs.com/package/@qetza/replacetokens) and be more similar with the new [ReplaceTokens GitHub Actions](https://github.com/marketplace/actions/replacetokens):
   - support only node 16 (mininum agent version 2.206.1)
   - updated to [fast-glob](https://github.com/mrmlnc/fast-glob) for glob pattern
-  - renamed input _targetFiles_ to _sources_ 
+  - renamed input _targetFiles_ to _sources_
+  - migrated to `fast-glob` for glob patterns causing syntax changes (must use forward slash (`/`) for directory separator whatever the OS)
   - removed support for comma-separated paths in _targetFiles_
   - renamed _encoding_ value `win1252` to `windows1252`
   - renamed _escapeType_ to _escape_
@@ -57,7 +58,8 @@ The task was completely rewritten to use the npm package [@qetza/replacetokens](
     # A multiline list of files to replace tokens in.
     # Each line supports:
     #   - multiple glob patterns separated by a semi-colon ';' using fast-glob syntax 
-    #     (you must always use forward slash '/' as a directory separator)
+    #     (you must always use forward slash '/' as a directory separator, on win32 will 
+    #     automatically replace backslash with forward slash)
     #   - outputing the result in another file adding the output path after an arrow '=>' 
     #     (if the output path is a relative path, it will be relative to the input file)
     #   - wildcard replacement in the output file name using an asterix '*' in the input 
diff --git a/tasks/ReplaceTokensV6/CHANGELOG.md b/tasks/ReplaceTokensV6/CHANGELOG.md
index 245333a..7de3893 100644
--- a/tasks/ReplaceTokensV6/CHANGELOG.md
+++ b/tasks/ReplaceTokensV6/CHANGELOG.md
@@ -1,6 +1,7 @@
 # Changelog
 ## 6.0.3
 - Fix minimum agent requirement to `2.206.1` ([#13](https://github.com/qetza/replacetokens-task/issues/13)).
+- Fix paths in sources incompatible with `fast-glob` syntax on win32 ([#16](https://github.com/qetza/replacetokens-task/issues/16)).
 
 ## 6.0.2
 - Add aliases for renamed inputs to ease upgrade ([#11](https://github.com/qetza/replacetokens-task/issues/11)).
diff --git a/tasks/ReplaceTokensV6/README.md b/tasks/ReplaceTokensV6/README.md
index 3007a9f..3bddab4 100644
--- a/tasks/ReplaceTokensV6/README.md
+++ b/tasks/ReplaceTokensV6/README.md
@@ -10,7 +10,8 @@ Please refer to the [release page](https://github.com/qetza/replacetokens-task/r
 The task was completely rewritten to use the npm package [@qetza/replacetokens](https://www.npmjs.com/package/@qetza/replacetokens) and be more similar with the new [ReplaceTokens GitHub Actions](https://github.com/marketplace/actions/replacetokens):
   - support only node 16 (mininum agent version 2.206.1)
   - updated to [fast-glob](https://github.com/mrmlnc/fast-glob) for glob pattern
-  - renamed input _targetFiles_ to _sources_ 
+  - renamed input _targetFiles_ to _sources_
+  - migrated to `fast-glob` for glob patterns causing syntax changes (must use forward slash (`/`) for directory separator whatever the OS)
   - removed support for comma-separated paths in _targetFiles_
   - renamed _encoding_ value `win1252` to `windows1252`
   - renamed _escapeType_ to _escape_
@@ -57,7 +58,8 @@ The task was completely rewritten to use the npm package [@qetza/replacetokens](
     # A multiline list of files to replace tokens in.
     # Each line supports:
     #   - multiple glob patterns separated by a semi-colon ';' using fast-glob syntax 
-    #     (you must always use forward slash '/' as a directory separator)
+    #     (you must always use forward slash '/' as a directory separator, on win32 will 
+    #     automatically replace backslash with forward slash)
     #   - outputing the result in another file adding the output path after an arrow '=>' 
     #     (if the output path is a relative path, it will be relative to the input file)
     #   - wildcard replacement in the output file name using an asterix '*' in the input 
diff --git a/tasks/ReplaceTokensV6/index.ts b/tasks/ReplaceTokensV6/index.ts
index 05a9656..2160b54 100644
--- a/tasks/ReplaceTokensV6/index.ts
+++ b/tasks/ReplaceTokensV6/index.ts
@@ -6,6 +6,7 @@ import * as rt from '@qetza/replacetokens';
 import stripJsonComments from './strip-json-comments';
 import * as telemetry from './telemetry';
 import { SpanStatusCode } from '@opentelemetry/api';
+import * as os from 'os';
 
 async function run() {
   const _debug = console.debug;
@@ -32,9 +33,7 @@ async function run() {
 
   try {
     // read and validate inputs
-    const sources = tl.getDelimitedInput('targetFiles', /\r?\n/);
-    if (sources.length === 0) throw new Error('Input required: sources');
-
+    const sources = getSources();
     const options: rt.Options = {
       addBOM: tl.getBoolInput('writeBOM'),
       encoding: tl.getInput('encoding') || rt.Encodings.Auto,
@@ -189,6 +188,20 @@ async function run() {
   }
 }
 
+var getSources = function (): string[] {
+  const sources = tl.getDelimitedInput('targetFiles', /\r?\n/);
+  if (sources.length === 0) throw new Error('Input required: sources');
+
+  // make sources compatible with fast-glob on win32
+  if (os.platform() === 'win32') {
+    for (var i in sources) {
+      sources[i] = sources[i].replace(/\\/g, '/').replace(/\/\/+/g, '/');
+    }
+  }
+
+  return sources;
+};
+
 var getChoiceInput = function (name: string, choices: string[], alias?: string): string {
   alias = alias || name;
   const input = tl.getInput(name)?.trim();
diff --git a/tasks/ReplaceTokensV6/tests/L0.ts b/tasks/ReplaceTokensV6/tests/L0.ts
index 71212b8..f4bb01e 100644
--- a/tasks/ReplaceTokensV6/tests/L0.ts
+++ b/tasks/ReplaceTokensV6/tests/L0.ts
@@ -1,10 +1,10 @@
 import * as path from 'path';
 import * as ttm from 'azure-pipelines-task-lib/mock-test';
+import * as os from 'os';
 
 require('chai').should();
 
 const data = path.join(__dirname, '..', '..', 'tests', '_data');
-const tmp = path.join(__dirname, '_tmp');
 
 describe('ReplaceTokens v6 L0 suite', function () {
   this.timeout(10000);
@@ -288,6 +288,28 @@ describe('ReplaceTokens v6 L0 suite', function () {
     }
   });
 
+  it('sources: normalize', async () => {
+    // arrange
+    const tp = path.join(__dirname, 'L0_Run.js');
+    const tr: ttm.MockTestRunner = new ttm.MockTestRunner(tp);
+
+    process.env['__sources__'] = 'D:\\a\\1\\s/test.json';
+
+    // act
+    await tr.runAsync();
+
+    // assert
+    runValidations(() => {
+      tr.succeeded.should.be.true;
+
+      if (os.platform() === 'win32') {
+        tr.stdout.should.include('sources: ["D:/a/1/s/test.json"]');
+      } else {
+        tr.stdout.should.include('sources: ["D:\\\\a\\\\1\\\\s/test.json"]');
+      }
+    }, tr);
+  });
+
   it('addBOM', async () => {
     // arrange
     const tp = path.join(__dirname, 'L0_Run.js');