diff --git a/include/configs/sandbox.h b/include/configs/sandbox.h
index 1c7bbe1..fb1c583 100644
--- a/include/configs/sandbox.h
+++ b/include/configs/sandbox.h
@@ -33,6 +33,8 @@
 #define CONFIG_OF_LIBFDT
 #define CONFIG_LMB
 #define CONFIG_FIT
+#define CONFIG_FIT_SIGNATURE
+#define CONFIG_RSA
 #define CONFIG_CMD_FDT
 
 #define CONFIG_FS_FAT