diff --git a/programs/pkey/rsa_genkey.c b/programs/pkey/rsa_genkey.c
index d0b1f4d..f691871 100644
--- a/programs/pkey/rsa_genkey.c
+++ b/programs/pkey/rsa_genkey.c
@@ -46,7 +46,7 @@
 #include <string.h>
 #endif
 
-#define KEY_SIZE 1024
+#define KEY_SIZE 2048
 #define EXPONENT 65537
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) ||   \