diff --git a/src/ESP32React/ArduinoJsonJWT.cpp b/src/ESP32React/ArduinoJsonJWT.cpp
index 7e7676af5..bbc2b11ac 100644
--- a/src/ESP32React/ArduinoJsonJWT.cpp
+++ b/src/ESP32React/ArduinoJsonJWT.cpp
@@ -70,16 +70,12 @@ void ArduinoJsonJWT::parseJWT(String jwt, JsonDocument & jsonDocument) {
  */
 String ArduinoJsonJWT::sign(String & payload) {
     std::array<unsigned char, 32> hmacResult{};
-    {
-        mbedtls_md_context_t ctx;
-        mbedtls_md_type_t    md_type = MBEDTLS_MD_SHA256;
-        mbedtls_md_init(&ctx);
-        mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(md_type), 1);
-        mbedtls_md_hmac_starts(&ctx, reinterpret_cast<const unsigned char *>(_secret.c_str()), _secret.length());
-        mbedtls_md_hmac_update(&ctx, reinterpret_cast<const unsigned char *>(payload.c_str()), payload.length());
-        mbedtls_md_hmac_finish(&ctx, hmacResult.data());
-        mbedtls_md_free(&ctx);
-    }
+    mbedtls_md_hmac(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256),
+                    reinterpret_cast<const unsigned char *>(_secret.c_str()),
+                    _secret.length(),
+                    reinterpret_cast<const unsigned char *>(payload.c_str()),
+                    payload.length(),
+                    hmacResult.data());
     return encode(reinterpret_cast<const char *>(hmacResult.data()), hmacResult.size());
 }