diff --git a/src/cli/odt2md.ts b/src/cli/odt2md.ts
index f60d5fc6..24f7c9ed 100644
--- a/src/cli/odt2md.ts
+++ b/src/cli/odt2md.ts
@@ -6,10 +6,10 @@ import {fileURLToPath} from 'url';
 import {Buffer} from 'buffer';
 import fs from 'fs';
 
-import {OdtProcessor} from '../odt/OdtProcessor.js';
-import {UnMarshaller} from '../odt/UnMarshaller.js';
-import {DocumentContent, DocumentStyles, LIBREOFFICE_CLASSES} from '../odt/LibreOffice.js';
-import {OdtToMarkdown} from '../odt/OdtToMarkdown.js';
+import {OdtProcessor} from '../odt/OdtProcessor.ts';
+import {UnMarshaller} from '../odt/UnMarshaller.ts';
+import {DocumentContent, DocumentStyles, LIBREOFFICE_CLASSES} from '../odt/LibreOffice.ts';
+import {OdtToMarkdown} from '../odt/OdtToMarkdown.ts';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
diff --git a/src/odt/postprocess/convertMathMl.ts b/src/odt/postprocess/convertMathMl.ts
index 0b91e759..7688669a 100644
--- a/src/odt/postprocess/convertMathMl.ts
+++ b/src/odt/postprocess/convertMathMl.ts
@@ -1,5 +1,5 @@
-import {MarkdownNodes} from '../MarkdownNodes.js';
-import {walkRecursiveSync} from '../markdownNodesUtils.js';
+import {MarkdownNodes} from '../MarkdownNodes.ts';
+import {walkRecursiveSync} from '../markdownNodesUtils.ts';
 
 export function convertMathMl(markdownChunks: MarkdownNodes) {
   walkRecursiveSync(markdownChunks.body, (chunk, ctx: { nodeIdx: number }) => {
diff --git a/src/odt/postprocess/postProcess.ts b/src/odt/postprocess/postProcess.ts
index b743b62b..9939ccaf 100644
--- a/src/odt/postprocess/postProcess.ts
+++ b/src/odt/postprocess/postProcess.ts
@@ -23,7 +23,7 @@ import {removeEmptyTags} from './removeEmptyTags.ts';
 import {removeExcessiveLines} from './removeExcessiveLines.ts';
 import {applyRewriteRules} from './applyRewriteRules.ts';
 import {RewriteRule} from '../applyRewriteRule.ts';
-import {convertMathMl} from './convertMathMl.js';
+import {convertMathMl} from './convertMathMl.ts';
 
 export async function postProcess(chunks: MarkdownNodes, rewriteRules: RewriteRule[]) {
   convertToc(chunks);