diff --git a/.changes/unreleased/Breaking-20251210-092132.yaml b/.changes/unreleased/Breaking-20251210-092132.yaml
new file mode 100644
index 0000000..c83b804
--- /dev/null
+++ b/.changes/unreleased/Breaking-20251210-092132.yaml
@@ -0,0 +1,6 @@
+kind: Breaking
+body: Config option `driver` is now required instead of defaulting to asyncpg
+time: 2025-12-10T09:21:32.2253488Z
+custom:
+    Author: rayakame
+    PR: "138"
diff --git a/.changie.yaml b/.changie.yaml
index 5065812..47aab19 100644
--- a/.changie.yaml
+++ b/.changie.yaml
@@ -29,6 +29,8 @@ kinds:
       auto: patch
     - label: Dependencys
       auto: patch
+    - label: Breaking
+      auto: patch
 newlines:
     afterChangelogHeader: 1
     beforeChangelogVersion: 1
diff --git a/internal/core/config.go b/internal/core/config.go
index 0d25a1e..3481888 100644
--- a/internal/core/config.go
+++ b/internal/core/config.go
@@ -44,7 +44,7 @@ func ParseConfig(req *plugin.GenerateRequest) (*Config, error) {
 		return nil, fmt.Errorf("unmarshalling plugin options: %w", err)
 	}
 	if config.SqlDriver == "" {
-		config.SqlDriver = SQLDriverAioSQLite
+		return nil, fmt.Errorf("invalid options: driver must not be empty")
 	}
 	val, err := isDriverAsync(config.SqlDriver)
 	if err != nil {