diff --git a/zk/Expressif_IoT_Development_Framework.md b/zk/Expressif_IoT_Development_Framework.md
index 152e9d8..a82d294 100644
--- a/zk/Expressif_IoT_Development_Framework.md
+++ b/zk/Expressif_IoT_Development_Framework.md
@@ -19,7 +19,7 @@ yay -Sy esp-idf
 
 ## Pre-requisites:
 
-```
+```txt
 To use ESP-IDF:
 
 1. Run /opt/esp-idf/install.sh to install ESP-IDF to ~/.espressif.