diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 52671cb..9317356 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,9 +17,9 @@ variables:
   ARM_TOOLCHAIN_URL: https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel/arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-eabi.tar.xz?rev=e434b9ea4afc4ed7998329566b764309&hash=CA590209F5774EE1C96E6450E14A3E26
   QEMU_PATH: /opt/qemu/bin/qemu-system-xtensa
   ZEPHYR_REPO: https://github.com/zephyrproject-rtos/zephyr.git
-  ZEPHYR_REPO_REV: v3.5.0
-  ZEPHYR_TOOLCHAIN: https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.16.3/toolchain_linux-x86_64_xtensa-espressif_esp32_zephyr-elf.tar.xz
-  ZEPHYR_SDK: https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.16.3/zephyr-sdk-0.16.3_linux-aarch64_minimal.tar.xz
+  ZEPHYR_REPO_REV: v4.0.0
+  ZEPHYR_TOOLCHAIN: https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.17.0/toolchain_linux-x86_64_xtensa-espressif_esp32_zephyr-elf.tar.xz
+  ZEPHYR_SDK: https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.17.0/zephyr-sdk-0.17.0_linux-aarch64_minimal.tar.xz
   PI_PICO_SDK_REV: 1.5.1
   PI_PICO_SDK: https://github.com/raspberrypi/pico-sdk
 
@@ -186,7 +186,7 @@ build_zephyr:
     - unset IDF_PATH
     - west zephyr-export
     - west update hal_espressif
-    - west build -p -b esp32_devkitc_wroom $CI_PROJECT_DIR/examples/zephyr_example -DZEPHYR_EXTRA_MODULES=$CI_PROJECT_DIR
+    - west build -p -b esp32_devkitc_wroom/esp32/procpu $CI_PROJECT_DIR/examples/zephyr_example -DZEPHYR_EXTRA_MODULES=$CI_PROJECT_DIR
 
 build_pi_pico:
   stage: build
diff --git a/examples/common/example_common.c b/examples/common/example_common.c
index 6a24bc4..710e412 100644
--- a/examples/common/example_common.c
+++ b/examples/common/example_common.c
@@ -345,7 +345,6 @@ esp_loader_error_t flash_binary(const uint8_t *bin, size_t size, size_t address)
 
         int progress = (int)(((float)written / binary_size) * 100);
         printf("\rProgress: %d %%", progress);
-        fflush(stdout);
     };
 
     printf("\nFinished programming\n");