diff --git a/Parsedown.php b/Parsedown.php
index 90e65a8..c709543 100755
--- a/Parsedown.php
+++ b/Parsedown.php
@@ -1136,7 +1136,7 @@ class Parsedown
 
             $substring = substr($excerpt, $extent);
 
-            if (preg_match('/^\s*\[(.+?)\]/', $substring, $matches))
+            if (preg_match('/^\s*\[([^][]+)\]/', $substring, $matches))
             {
                 $Link['label'] = strtolower($matches[1]);
 
diff --git a/test/data/implicit_reference.html b/test/data/implicit_reference.html
index 209b85e..24b51c1 100644
--- a/test/data/implicit_reference.html
+++ b/test/data/implicit_reference.html
@@ -1,3 +1,4 @@
 <p>an <a href="http://example.com">implicit</a> reference link</p>
 <p>an <a href="http://example.com">implicit</a> reference link with an empty link definition</p>
+<p>an <a href="http://example.com">implicit</a> reference link followed by <a href="http://cnn.com">another</a></p>
 <p>an <a href="http://example.com" title="Example">explicit</a> reference link with a title</p>
\ No newline at end of file
diff --git a/test/data/implicit_reference.md b/test/data/implicit_reference.md
index d128826..f850df9 100644
--- a/test/data/implicit_reference.md
+++ b/test/data/implicit_reference.md
@@ -4,6 +4,10 @@ an [implicit] reference link
 
 an [implicit][] reference link with an empty link definition
 
+an [implicit][] reference link followed by [another][]
+
+[another]: http://cnn.com
+
 an [explicit][example] reference link with a title
 
 [example]: http://example.com "Example"
\ No newline at end of file