diff --git a/extension.js b/extension.js
index e0e28a2..20fbf5e 100644
--- a/extension.js
+++ b/extension.js
@@ -282,7 +282,7 @@ function convertMarkdownToHtml(filename, type, text) {
   if (vscode.workspace.getConfiguration('markdown-pdf')['markdown-it-include']['enable']) {
     md.use(require("markdown-it-include"), {
       root: path.dirname(filename),
-      includeRe: /:\[.+\]\((.+\..+)\)/i
+      includeRe: /:\[.+\]\((?!https?:|ftp:)(.+\..+)\)/i
     });
   }
 
@@ -898,4 +898,4 @@ function init() {
   } catch (error) {
     showErrorMessage('init()', error);
   }
-}
+}
\ No newline at end of file