diff --git a/md4tj_parse.el b/md4tj_parse.el
index ff10ab8..982ee6c 100644
--- a/md4tj_parse.el
+++ b/md4tj_parse.el
@@ -13,7 +13,7 @@
 (defun md4tj-begin-tag (tag &optional attrs)
   "Return beginning html tag for TAG with optional ATTRS."
   (concat "<" tag
-		  (mapconcat 'identity (cl-map 'listp (lambda (l) (concat " " (nth 0 l) "=" (nth 1 l))) attrs) "")
+		  (mapconcat 'identity (cl-map 'listp (lambda (l) (concat " " (nth 0 l) "=" "\"" (nth 1 l) "\"")) attrs) "")
 		  ">"))
 
 (defun md4tj-end-tag (tag)
diff --git a/test_file.html b/test_file.html
index b7c2d9a..878c267 100644
--- a/test_file.html
+++ b/test_file.html
@@ -4,8 +4,8 @@
 <h3>Hello world!</h3>
 <h4>Hello <strong><em>world</em></strong>!</h4>
 <br/>
-<p><a href=https://example.com>Example website</a></p>
-<p><img src=usbs.png alt=Example image></p>
+<p><a href="https://example.com">Example website</a></p>
+<p><img src="usbs.png" alt="Example image"></p>
 <br/>
 <ul>
 <li><p>unordered item 1</p></li>