diff --git a/boot/zephyr/boards/nucleo_f207zg.conf b/boot/zephyr/boards/nucleo_f207zg.conf
new file mode 100644
index 000000000..3267b8afa
--- /dev/null
+++ b/boot/zephyr/boards/nucleo_f207zg.conf
@@ -0,0 +1,2 @@
+CONFIG_BOOT_MAX_IMG_SECTORS_AUTO=n
+CONFIG_BOOT_MAX_IMG_SECTORS=256
\ No newline at end of file
diff --git a/boot/zephyr/boards/nucleo_g071rb.conf b/boot/zephyr/boards/nucleo_g071rb.conf
new file mode 100644
index 000000000..3267b8afa
--- /dev/null
+++ b/boot/zephyr/boards/nucleo_g071rb.conf
@@ -0,0 +1,2 @@
+CONFIG_BOOT_MAX_IMG_SECTORS_AUTO=n
+CONFIG_BOOT_MAX_IMG_SECTORS=256
\ No newline at end of file