diff --git a/.upgrade.yml b/.upgrade.yml
deleted file mode 100644
index d13de71..0000000
--- a/.upgrade.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-mappings:
-  StringTagField: SilverStripe\TagField\StringTagField
-  TagField: SilverStripe\TagField\TagField
-  TagField_Readonly: SilverStripe\TagField\TagField\Readonly
diff --git a/src/StringTagField.php b/src/StringTagField.php
index fe55c28..7343731 100644
--- a/src/StringTagField.php
+++ b/src/StringTagField.php
@@ -66,7 +66,6 @@ class StringTagField extends DropdownField
      */
     protected $isMultiple = true;
 
-    /** @skipUpgrade */
     protected $schemaComponent = 'TagField';
 
     /**
diff --git a/src/TagField.php b/src/TagField.php
index f280634..9f5c485 100644
--- a/src/TagField.php
+++ b/src/TagField.php
@@ -63,7 +63,6 @@ class TagField extends MultiSelectField
      */
     protected $isMultiple = true;
 
-    /** @skipUpgrade */
     protected $schemaComponent = 'TagField';
 
     /**