diff --git a/boot/zephyr/prj.conf b/boot/zephyr/prj.conf
index 3bc1e02..e4d851c 100644
--- a/boot/zephyr/prj.conf
+++ b/boot/zephyr/prj.conf
@@ -38,3 +38,6 @@
 # CONFIG_BT is not set
 # CONFIG_BT_CTLR is not set
 # CONFIG_I2C is not set
+
+### Ensure Zephyr logging changes don't use more resources
+CONFIG_LOG_DEFAULT_LEVEL=0