diff --git a/core/imageboard/image.php b/core/imageboard/image.php
index 5d31ff90..79afc524 100644
--- a/core/imageboard/image.php
+++ b/core/imageboard/image.php
@@ -157,7 +157,7 @@ class Image
         $yays = 0;
         $nays = 0;
         foreach ($tags as $tag) {
-            if (!preg_match("/^-?[a-zA-Z0-9_-]+$/", $tag)) {
+            if (!preg_match("/^-?[a-zA-Z0-9_'-]+$/", $tag)) {
                 return null;
             }
             if ($tag[0] == "-") {