diff --git a/composer.json b/composer.json
index 1beb33f..00291d8 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,8 @@
 
     "require": {
         "php": ">=7.1",
-        "ext-json": "*"
+        "ext-json": "*",
+        "ext-mbstring": "*"
     },
 
     "autoload": {
diff --git a/src/SqlSegment.php b/src/SqlSegment.php
index 0c2640f..879513f 100644
--- a/src/SqlSegment.php
+++ b/src/SqlSegment.php
@@ -84,6 +84,15 @@ public function setDatabaseVersion(string $databaseVersion)
         return $this;
     }
 
+    private function limitQueryLength(string $query, int $limit = 50000): string
+    {
+        if (mb_strwidth($query, 'UTF-8') <= $limit) {
+            return $query;
+        }
+
+        return rtrim(mb_strimwidth($query, 0, $limit, '', 'UTF-8'));
+    }
+
     /**
      * @param string $driverVersion
      * @return static
@@ -112,7 +121,7 @@ public function setUser(string $user)
      */
     public function setQuery(string $query)
     {
-        $this->query = $query;
+        $this->query = $this->limitQueryLength($query);
 
         return $this;
     }