diff --git a/doc/EN/syntax/00_basic.md b/doc/EN/syntax/00_basic.md
index f140cb02..ec0390bc 100644
--- a/doc/EN/syntax/00_basic.md
+++ b/doc/EN/syntax/00_basic.md
@@ -116,5 +116,5 @@ x \
 ```
 
 <p align='center'>
-    Previous | <a href='. /01_literal.md'>Next</a>
+    Previous | <a href='. /01_literal.html'>Next</a>
 </p>
diff --git a/doc/EN/syntax/01_literal.md b/doc/EN/syntax/01_literal.md
index 3bc11fb2..c8faa29e 100644
--- a/doc/EN/syntax/01_literal.md
+++ b/doc/EN/syntax/01_literal.md
@@ -145,5 +145,5 @@ assert 1m / 1s == 1 (m/s)
 ```
 
 <p align='center'>
-    <a href='. /00_basic.md'>Previous</a> | <a href='. /02_name.md'>Next</a>
+    <a href='. /00_basic.html'>Previous</a> | <a href='. /02_name.html'>Next</a>
 </p>
diff --git a/doc/JA/syntax/00_basic.md b/doc/JA/syntax/00_basic.md
index 700f6390..63ac026b 100644
--- a/doc/JA/syntax/00_basic.md
+++ b/doc/JA/syntax/00_basic.md
@@ -114,5 +114,5 @@ x \
 ```
 
 <p align='center'>
-    Previous | <a href='./01_literal.md'>Next</a>
+    Previous | <a href='./01_literal.html'>Next</a>
 </p>
diff --git a/doc/JA/syntax/01_literal.md b/doc/JA/syntax/01_literal.md
index 456b3ff3..57a2e388 100644
--- a/doc/JA/syntax/01_literal.md
+++ b/doc/JA/syntax/01_literal.md
@@ -146,5 +146,5 @@ assert 1m / 1s == 1 (m/s)
 ```
 
 <p align='center'>
-    <a href='./00_basic.md'>Previous</a> | <a href='./02_name.md'>Next</a>
+    <a href='./00_basic.html'>Previous</a> | <a href='./02_name.html'>Next</a>
 </p>