diff --git a/docs/helios4/intro.md b/docs/helios4/intro.md
index c5082bd..f070946 100644
--- a/docs/helios4/intro.md
+++ b/docs/helios4/intro.md
@@ -10,6 +10,8 @@ The **Marvell ARMADA® 388** is a robust and energy-efficient System on Chip (So
 
 ## Overall Specifications
 
+### Board
+
 |**Board Specifications**||
 |------------|-----------|
 |**SoC**||
@@ -38,6 +40,8 @@ The **Marvell ARMADA® 388** is a robust and energy-efficient System on Chip (So
 |RTC Battery|1|
 |DC input|12V / 8A|
 
+### Mechanical
+
 |**Mechanical Specifications**||
 |------------|-----------|
 |Board Dimension|100mm x 100mm|
@@ -46,6 +50,8 @@ The **Marvell ARMADA® 388** is a robust and energy-efficient System on Chip (So
 |Case Weight (without HDD)|450gr|
 |Case Material|Colored Acrylic|
 
+### Software
+
 |**Software Specifications**||
 |------------|-----------|
 |Operating System|Linux Debian and Ubuntu|
diff --git a/docs/helios64/intro.md b/docs/helios64/intro.md
index c1173b5..87427b3 100644
--- a/docs/helios64/intro.md
+++ b/docs/helios64/intro.md
@@ -14,9 +14,9 @@ Helios64 is our latest design for the ultimate ARM powered NAS. Compared to the
 * More functionalities with Display Port and DAS modes support,
 * Reinforced reliability with Built-in UPS.
 
-# Overall Specifications
+## Overall Specifications
 
-## Board
+### Board
 
 |**Board Specifications**||
 |------------|-----------|
@@ -54,7 +54,7 @@ Helios64 is our latest design for the ultimate ARM powered NAS. Compared to the
 
 ![Helios64 Top View](/helios64/img/intro/helios64-top-view.jpg)
 
-## Mechanical
+### Mechanical
 
 |**Mechanical Specifications**||
 |------------|-----------|
@@ -64,7 +64,7 @@ Helios64 is our latest design for the ultimate ARM powered NAS. Compared to the
 |Case Weight|3.5Kg (without HDD)|
 |Case Material|Aluminum + Metal|
 
-## Software
+### Software
 
 |**Software Specifications**||
 |------------|-----------|