diff --git a/yacl/crypto/rand/drbg/openssl_factory.cc b/yacl/crypto/rand/drbg/openssl_factory.cc
index aaf326c..910c84a 100644
--- a/yacl/crypto/rand/drbg/openssl_factory.cc
+++ b/yacl/crypto/rand/drbg/openssl_factory.cc
@@ -80,7 +80,7 @@ OpensslDrbg::OpensslDrbg(std::string type,
     // instantiate the es_ctx
     OSSL_RET_1(EVP_RAND_instantiate(es_ctx.get(), 128, 0, nullptr, 0, nullptr));
   } else {
-    SPDLOG_WARN(
+    SPDLOG_DEBUG(
         "Yacl has been configured to use Yacl's entropy source, but unable "
         "to find one. Fallback to use openssl's default entropy srouce");
   }