diff --git a/boot/zephyr/boards/esp32_devkitc_wroom.conf b/boot/zephyr/boards/esp32_devkitc_wroom.conf
index 1b1e862..76a126c 100644
--- a/boot/zephyr/boards/esp32_devkitc_wroom.conf
+++ b/boot/zephyr/boards/esp32_devkitc_wroom.conf
@@ -15,3 +15,4 @@
 CONFIG_DEBUG=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/esp32_devkitc_wrover.conf b/boot/zephyr/boards/esp32_devkitc_wrover.conf
index 1b1e862..76a126c 100644
--- a/boot/zephyr/boards/esp32_devkitc_wrover.conf
+++ b/boot/zephyr/boards/esp32_devkitc_wrover.conf
@@ -15,3 +15,4 @@
 CONFIG_DEBUG=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/esp32_ethernet_kit.conf b/boot/zephyr/boards/esp32_ethernet_kit.conf
index 70a092a..b2b4059 100644
--- a/boot/zephyr/boards/esp32_ethernet_kit.conf
+++ b/boot/zephyr/boards/esp32_ethernet_kit.conf
@@ -16,3 +16,4 @@
 CONFIG_DEBUG=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/esp32c3_devkitm.conf b/boot/zephyr/boards/esp32c3_devkitm.conf
index 8a90ef8..56298cd 100644
--- a/boot/zephyr/boards/esp32c3_devkitm.conf
+++ b/boot/zephyr/boards/esp32c3_devkitm.conf
@@ -17,3 +17,4 @@
 
 CONFIG_XIP=n
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/esp32s2_franzininho.conf b/boot/zephyr/boards/esp32s2_franzininho.conf
index 70a092a..b2b4059 100644
--- a/boot/zephyr/boards/esp32s2_franzininho.conf
+++ b/boot/zephyr/boards/esp32s2_franzininho.conf
@@ -16,3 +16,4 @@
 CONFIG_DEBUG=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/esp32s2_saola.conf b/boot/zephyr/boards/esp32s2_saola.conf
index 70a092a..b2b4059 100644
--- a/boot/zephyr/boards/esp32s2_saola.conf
+++ b/boot/zephyr/boards/esp32s2_saola.conf
@@ -16,3 +16,4 @@
 CONFIG_DEBUG=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/esp32s3_devkitm.conf b/boot/zephyr/boards/esp32s3_devkitm.conf
index 70a092a..b2b4059 100644
--- a/boot/zephyr/boards/esp32s3_devkitm.conf
+++ b/boot/zephyr/boards/esp32s3_devkitm.conf
@@ -16,3 +16,4 @@
 CONFIG_DEBUG=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/esp_wrover_kit.conf b/boot/zephyr/boards/esp_wrover_kit.conf
index 70a092a..b2b4059 100644
--- a/boot/zephyr/boards/esp_wrover_kit.conf
+++ b/boot/zephyr/boards/esp_wrover_kit.conf
@@ -16,3 +16,4 @@
 CONFIG_DEBUG=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/heltec_wifi_lora32_v2.conf b/boot/zephyr/boards/heltec_wifi_lora32_v2.conf
index 70a092a..b2b4059 100644
--- a/boot/zephyr/boards/heltec_wifi_lora32_v2.conf
+++ b/boot/zephyr/boards/heltec_wifi_lora32_v2.conf
@@ -16,3 +16,4 @@
 CONFIG_DEBUG=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/icev_wireless.conf b/boot/zephyr/boards/icev_wireless.conf
index 792e0e3..5d761a5 100644
--- a/boot/zephyr/boards/icev_wireless.conf
+++ b/boot/zephyr/boards/icev_wireless.conf
@@ -16,3 +16,4 @@
 
 CONFIG_XIP=n
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/m5stickc_plus.conf b/boot/zephyr/boards/m5stickc_plus.conf
index 70a092a..b2b4059 100644
--- a/boot/zephyr/boards/m5stickc_plus.conf
+++ b/boot/zephyr/boards/m5stickc_plus.conf
@@ -16,3 +16,4 @@
 CONFIG_DEBUG=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/odroid_go.conf b/boot/zephyr/boards/odroid_go.conf
index be139d6..916d6cf 100644
--- a/boot/zephyr/boards/odroid_go.conf
+++ b/boot/zephyr/boards/odroid_go.conf
@@ -18,3 +18,4 @@
 CONFIG_HEAP_MEM_POOL_SIZE=4096
 
 CONFIG_REGULATOR=n
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/olimex_esp32_evb.conf b/boot/zephyr/boards/olimex_esp32_evb.conf
index 70a092a..b2b4059 100644
--- a/boot/zephyr/boards/olimex_esp32_evb.conf
+++ b/boot/zephyr/boards/olimex_esp32_evb.conf
@@ -16,3 +16,4 @@
 CONFIG_DEBUG=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/stamp_c3.conf b/boot/zephyr/boards/stamp_c3.conf
index 8a90ef8..56298cd 100644
--- a/boot/zephyr/boards/stamp_c3.conf
+++ b/boot/zephyr/boards/stamp_c3.conf
@@ -17,3 +17,4 @@
 
 CONFIG_XIP=n
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y
diff --git a/boot/zephyr/boards/xiao_esp32c3.conf b/boot/zephyr/boards/xiao_esp32c3.conf
index 8a90ef8..56298cd 100644
--- a/boot/zephyr/boards/xiao_esp32c3.conf
+++ b/boot/zephyr/boards/xiao_esp32c3.conf
@@ -17,3 +17,4 @@
 
 CONFIG_XIP=n
 CONFIG_HEAP_MEM_POOL_SIZE=4096
+CONFIG_MINIMAL_LIBC=y