diff --git a/trading_assistant_api/common/logger/logger.go b/trading_assistant_api/common/logger/logger.go
index 52e4bfa..877e3fc 100644
--- a/trading_assistant_api/common/logger/logger.go
+++ b/trading_assistant_api/common/logger/logger.go
@@ -72,7 +72,14 @@ func SetupTimezone(tz string) error {
 	}
 	loc, err := time.LoadLocation(tz)
 	if err != nil {
-		return err
+		// fallback for alpine without tzdata
+		switch tz {
+		case "Asia/Shanghai", "PRC", "CST":
+			time.Local = time.FixedZone("CST", 8*3600)
+			return nil
+		default:
+			return err
+		}
 	}
 	time.Local = loc
 	return nil
diff --git a/trading_assistant_api/services/country/Dockerfile b/trading_assistant_api/services/country/Dockerfile
index ca12f9e..57a3f59 100644
--- a/trading_assistant_api/services/country/Dockerfile
+++ b/trading_assistant_api/services/country/Dockerfile
@@ -12,7 +12,8 @@ RUN cd services/country && go mod download
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /workspace/bin/country-service ./services/country
 
 FROM alpine:3.19
-RUN adduser -D -u 10002 app
+RUN apk add --no-cache tzdata && adduser -D -u 10002 app
+ENV TZ=Asia/Shanghai
 USER app
 COPY --from=builder /workspace/bin/country-service /usr/local/bin/country-service
 EXPOSE 8081
diff --git a/trading_assistant_api/services/user/Dockerfile b/trading_assistant_api/services/user/Dockerfile
index 56557e8..17ef49e 100644
--- a/trading_assistant_api/services/user/Dockerfile
+++ b/trading_assistant_api/services/user/Dockerfile
@@ -12,7 +12,8 @@ RUN cd services/user && go mod download
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /workspace/bin/user-service ./services/user
 
 FROM alpine:3.19
-RUN adduser -D -u 10001 app
+RUN apk add --no-cache tzdata && adduser -D -u 10001 app
+ENV TZ=Asia/Shanghai
 USER app
 COPY --from=builder /workspace/bin/user-service /usr/local/bin/user-service
 EXPOSE 8080