diff --git a/src/Tokenizers/MySQL/ColumnTokenizer.php b/src/Tokenizers/MySQL/ColumnTokenizer.php
index 27ad6b5..c541cb1 100644
--- a/src/Tokenizers/MySQL/ColumnTokenizer.php
+++ b/src/Tokenizers/MySQL/ColumnTokenizer.php
@@ -79,7 +79,7 @@ protected function consumeColumnType()
             $columnType = explode('(', $columnType)[0];
         }
 
-        $this->columnDataType = $columnType;
+        $this->columnDataType = strtolower($columnType);
 
         $this->resolveColumnMethod();
         if ($hasConstraints) {