diff --git a/zk/Programming_ESP32_with_Expressif_IoT_Development_Framework.md b/zk/Programming_ESP32_with_Expressif_IoT_Development_Framework.md
index 9811eec..8322b65 100644
--- a/zk/Programming_ESP32_with_Expressif_IoT_Development_Framework.md
+++ b/zk/Programming_ESP32_with_Expressif_IoT_Development_Framework.md
@@ -104,7 +104,7 @@ idf.py -p /dev/ttyUSB0 monitor
 
 Example output:
 
-```
+```txt
 Serial port /dev/ttyUSB0
 Connecting....
 Chip is ESP32-D0WD-V3 (revision v3.1)
@@ -151,7 +151,7 @@ To monitor to execution of the program running on the device.
 
 The 'Hello World' example just logs some specs and then restarts in a loop.
 
-```
+```txt
 Hello world!
 This is esp32 chip with 2 CPU core(s), WiFi/BTBLE, silicon revision v3.1, 2MB external flash
 Minimum free heap size: 306072 bytes