diff --git a/core/polyfills.php b/core/polyfills.php
index a0ed4597..365e9ddb 100644
--- a/core/polyfills.php
+++ b/core/polyfills.php
@@ -613,7 +613,7 @@ function autodate(string $date, bool $html=true): string
 function isValidDateTime(string $dateTime): bool
 {
     if (preg_match("/^(\d{4})-(\d{2})-(\d{2}) ([01][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])$/", $dateTime, $matches)) {
-        if (checkdate($matches[2], $matches[3], $matches[1])) {
+        if (checkdate((int)$matches[2], (int)$matches[3], (int)$matches[1])) {
             return true;
         }
     }
@@ -628,7 +628,7 @@ function isValidDate(string $date): bool
 {
     if (preg_match("/^(\d{4})-(\d{2})-(\d{2})$/", $date, $matches)) {
         // checkdate wants (month, day, year)
-        if (checkdate($matches[2], $matches[3], $matches[1])) {
+        if (checkdate((int)$matches[2], (int)$matches[3], (int)$matches[1])) {
             return true;
         }
     }
diff --git a/ext/tag_history/main.php b/ext/tag_history/main.php
index fd7c93ea..57a4ca9c 100644
--- a/ext/tag_history/main.php
+++ b/ext/tag_history/main.php
@@ -303,7 +303,7 @@ class TagHistory extends Extension
 			', $select_args);
 
             if (!empty($row)) {
-                $revert_id = $row['id'];
+                $revert_id = (int)$row['id'];
                 $result = $this->get_tag_history_from_revert($revert_id);
 
                 if (empty($result)) {
@@ -315,8 +315,8 @@ class TagHistory extends Extension
                 }
 
                 // lets get the values out of the result
-                $stored_result_id = int_escape($result['id']);
-                $stored_image_id = int_escape($result['image_id']);
+                $stored_result_id = (int)$result['id'];
+                $stored_image_id = (int)$result['image_id'];
                 $stored_tags = $result['tags'];
 
                 $image = Image::by_id($stored_image_id);