diff --git a/.goreleaser.yaml b/.goreleaser.yaml
index 5287089..da4b89c 100644
--- a/.goreleaser.yaml
+++ b/.goreleaser.yaml
@@ -1,5 +1,7 @@
 builds:
   - main: ./cmd/unspeech
+    ldflags:
+      - -X main.version={{.Version}}
     # remove 386
     goarch:
       - amd64
diff --git a/Dockerfile b/Dockerfile
index d1fa7eb..d9f0476 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,9 @@ RUN go mod download
 
 COPY . .
 
-RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -o ./result/unspeech ./cmd/unspeech
+ARG VERSION=0.0.0
+
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -ldflags="-X main.version=${VERSION}" -o ./result/unspeech ./cmd/unspeech
 
 # https://github.com/GoogleContainerTools/distroless
 FROM gcr.io/distroless/static-debian12 AS app
diff --git a/cmd/unspeech/main.go b/cmd/unspeech/main.go
index 08a3957..539fbfb 100644
--- a/cmd/unspeech/main.go
+++ b/cmd/unspeech/main.go
@@ -14,11 +14,12 @@ import (
 	"github.com/moeru-ai/unspeech/pkg/ho"
 )
 
+var version = "0.0.0"
+
 func main() {
 	rootCmd := &cobra.Command{
-		Use: "unspeech",
-		// TODO: set version
-		Version: "0.0.0",
+		Use:     "unspeech",
+		Version: version,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			slog.SetDefault(slog.New(tint.NewHandler(os.Stdout, nil)))
 
diff --git a/internal/middlewares/error_handler.go b/internal/middlewares/error_handler.go
index a93fbe8..a914a79 100644
--- a/internal/middlewares/error_handler.go
+++ b/internal/middlewares/error_handler.go
@@ -23,8 +23,9 @@ func HandleErrors() echo.MiddlewareFunc {
 					slog.Error("unknown error responded", slog.Any("error", err.Error()))
 				}
 				if 500 >= errResp.Status || errResp.Status < 600 {
-					attrs := make([]slog.Attr, 0)
-					attrs = append(attrs, logs.Caller(errResp.Caller())...)
+					callerAttrs := logs.Caller(errResp.Caller())
+					attrs := make([]slog.Attr, 0, len(callerAttrs)+1)
+					attrs = append(attrs, callerAttrs...)
 					attrs = append(attrs, slog.Any("error", errResp.Error()))
 					slog.Error("error occurred during request", lo.ToAnySlice(attrs)...)
 				}
diff --git a/pkg/backend/doubao/voices.go b/pkg/backend/doubao/voices.go
index ba6659c..a7abb23 100644
--- a/pkg/backend/doubao/voices.go
+++ b/pkg/backend/doubao/voices.go
@@ -39,6 +39,7 @@ func HandleVoices(c echo.Context, options mo.Option[types.VoicesRequestOptions])
 	voices := make([]types.Voice, 0, len(voicesResponse))
 
 	for _, voice := range voicesResponse {
+		//nolint:mnd
 		voices = append(voices, types.Voice{
 			ID:          voice.Voice,
 			Name:        voice.Name,
diff --git a/pkg/backend/microsoft/speech.go b/pkg/backend/microsoft/speech.go
index bae7544..45fe0eb 100644
--- a/pkg/backend/microsoft/speech.go
+++ b/pkg/backend/microsoft/speech.go
@@ -35,12 +35,12 @@ type ssml struct {
 }
 
 type extraBody struct {
-	DisableSSML  mo.Option[bool]   `json:"disable_ssml,omitempty"`
+	DisableSSML  mo.Option[bool]   `json:"disable_ssml,omitzero"`
 	Region       string            `json:"region"`
-	DeploymentID mo.Option[string] `json:"deployment_id,omitempty"`
-	Lang         mo.Option[string] `json:"lang,omitempty"`
-	Gender       mo.Option[string] `json:"gender,omitempty"`
-	SampleRate   mo.Option[uint]   `json:"sample_rate,omitempty"`
+	DeploymentID mo.Option[string] `json:"deployment_id,omitzero"`
+	Lang         mo.Option[string] `json:"lang,omitzero"`
+	Gender       mo.Option[string] `json:"gender,omitzero"`
+	SampleRate   mo.Option[uint]   `json:"sample_rate,omitzero"`
 }
 
 var (
diff --git a/sdk/typescript/tsdown.config.ts b/sdk/typescript/tsdown.config.ts
index 09a3ec5..16cf001 100644
--- a/sdk/typescript/tsdown.config.ts
+++ b/sdk/typescript/tsdown.config.ts
@@ -6,5 +6,5 @@ export default defineConfig({
   dts: true,
   entry: [join('src', 'index.ts')],
   format: 'esm',
-  tsconfig: 'tsconfig.lib.json',
+  tsconfig: 'tsconfig.json',
 })