diff --git a/configs/baremetal.h b/configs/baremetal.h
index 6b41e76..32ab973 100644
--- a/configs/baremetal.h
+++ b/configs/baremetal.h
@@ -55,6 +55,10 @@
 #define MBEDTLS_ECP_DP_SECP256R1_ENABLED
 #define MBEDTLS_ECP_NIST_OPTIM
 #define MBEDTLS_ECDSA_DETERMINISTIC
+#define MBEDTLS_ECP_WINDOW_SIZE        2
+#define MBEDTLS_ECP_FIXED_POINT_OPTIM  0
+#define MBEDTLS_ECP_MAX_BITS   256
+#define MBEDTLS_MPI_MAX_SIZE    32 // 256 bits is 32 bytes
 
 /* Key exchanges */
 #define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED