diff --git a/CHANGELOG.md b/CHANGELOG.md
index d6215679..b5c7123b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 * [#225](https://github.com/shlinkio/shlink/issues/225) Performance and maintainability slightly improved by enforcing via code sniffer that all global namespace classes, functions and constants are explicitly imported.
 * [#196](https://github.com/shlinkio/shlink/issues/196) Reduced anemic model in entities, defining more expressive public APIs instead.
 * [#249](https://github.com/shlinkio/shlink/issues/249) Added [functional-php](https://github.com/lstrojny/functional-php) to ease collections handling.
+* [#253](https://github.com/shlinkio/shlink/issues/253) Increased `user_agent` column length in `visits` table to 512.
 
 #### Deprecated
 
diff --git a/data/migrations/Version20181110175521.php b/data/migrations/Version20181110175521.php
new file mode 100644
index 00000000..48e26f9e
--- /dev/null
+++ b/data/migrations/Version20181110175521.php
@@ -0,0 +1,36 @@
+<?php
+declare(strict_types=1);
+
+namespace ShlinkMigrations;
+
+use Doctrine\DBAL\Schema\Column;
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\DBAL\Schema\SchemaException;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20181110175521 extends AbstractMigration
+{
+    /**
+     * @throws SchemaException
+     */
+    public function up(Schema $schema): void
+    {
+        $this->getUserAgentColumn($schema)->setLength(512);
+    }
+
+    /**
+     * @throws SchemaException
+     */
+    public function down(Schema $schema): void
+    {
+        $this->getUserAgentColumn($schema)->setLength(256);
+    }
+
+    /**
+     * @throws SchemaException
+     */
+    private function getUserAgentColumn(Schema $schema): Column
+    {
+        return $schema->getTable('visits')->getColumn('user_agent');
+    }
+}
diff --git a/data/migrations_template.txt b/data/migrations_template.txt
index 41c4a8c8..2e3e1edb 100644
--- a/data/migrations_template.txt
+++ b/data/migrations_template.txt
@@ -6,9 +6,6 @@ namespace <namespace>;
 use Doctrine\DBAL\Schema\Schema;
 use Doctrine\Migrations\AbstractMigration;
 
-/**
- * Auto-generated Migration: Please modify to your needs!
- */
 final class Version<version> extends AbstractMigration
 {
     public function up(Schema $schema): void
diff --git a/module/Core/src/Entity/Visit.php b/module/Core/src/Entity/Visit.php
index d88448e1..54926e9e 100644
--- a/module/Core/src/Entity/Visit.php
+++ b/module/Core/src/Entity/Visit.php
@@ -39,7 +39,7 @@ class Visit extends AbstractEntity implements JsonSerializable
     private $remoteAddr;
     /**
      * @var string
-     * @ORM\Column(type="string", length=256, name="user_agent", nullable=true)
+     * @ORM\Column(type="string", length=512, name="user_agent", nullable=true)
      */
     private $userAgent;
     /**