diff --git a/mateclaw-server/Dockerfile b/mateclaw-server/Dockerfile
index 529319d5..2898c2ae 100644
--- a/mateclaw-server/Dockerfile
+++ b/mateclaw-server/Dockerfile
@@ -109,7 +109,14 @@ ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright \
     LC_ALL=C.UTF-8 \
     JAVA_TOOL_OPTIONS="-Duser.timezone=Asia/Shanghai -Dsun.jnu.encoding=UTF-8"
 
+# Default DB profile, overridable by the SPRING_PROFILES_ACTIVE env var
+# (compose sets it explicitly: mysql / postgres / kingbase). It must be an ENV,
+# not a -D system property on the ENTRYPOINT: a hardcoded
+# -Dspring.profiles.active outranks the SPRING_PROFILES_ACTIVE env var and would
+# silently pin the profile regardless of what compose passes.
+ENV SPRING_PROFILES_ACTIVE=mysql
+
 COPY --from=builder /build/mateclaw-server/target/*.jar app.jar
 EXPOSE 18088
 EXPOSE 1455
-ENTRYPOINT ["java", "-jar", "-Dspring.profiles.active=mysql", "app.jar"]
+ENTRYPOINT ["java", "-jar", "app.jar"]