diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d45cc7..1376380 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Ahom numeral system
 - Warang Citi numeral system
 - Bhaiksuki numeral system
+- Tamil numeral system
+### Changed
+- `README.md` updated
 ## [1.3] - 2026-01-28
 ### Added
 - English full stop mode
@@ -151,4 +154,4 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 [0.4]: https://github.com/openscilab/xnum/compare/v0.3...v0.4
 [0.3]: https://github.com/openscilab/xnum/compare/v0.2...v0.3
 [0.2]: https://github.com/openscilab/xnum/compare/v0.1...v0.2
-[0.1]: https://github.com/openscilab/xnum/compare/2ed44ad...v0.1
\ No newline at end of file
+[0.1]: https://github.com/openscilab/xnum/compare/2ed44ad...v0.1
diff --git a/README.md b/README.md
index 133198e..24f5fdf 100644
--- a/README.md
+++ b/README.md
@@ -158,6 +158,12 @@ It can automatically detect mixed numeral formats in a piece of text and convert
 - Ahom
 - Warang Citi
 - Bhaiksuki
+- Tamil
+
+> [!NOTE]
+> XNum performs digit-by-digit conversion using positional notation.
+> While most supported systems are positional, a small subset are non-positional and follow different numeric conventions.
+> For them, XNum converts only individual digit symbols and does not interpret or generate non-positional number forms.
 
 ## Issues & bug reports
 
diff --git a/tests/test_conversion.py b/tests/test_conversion.py
index 42cf42c..f75f7c8 100644
--- a/tests/test_conversion.py
+++ b/tests/test_conversion.py
@@ -92,6 +92,7 @@
     NumeralSystem.AHOM: "𑜰𑜱𑜲𑜳𑜴𑜵𑜶𑜷𑜸𑜹",
     NumeralSystem.WARANG_CITI: "𑣠𑣡𑣢𑣣𑣤𑣥𑣦𑣧𑣨𑣩",
     NumeralSystem.BHAIKSUKI: "𑱐𑱑𑱒𑱓𑱔𑱕𑱖𑱗𑱘𑱙",
+    NumeralSystem.TAMIL: "௦௧௨௩௪௫௬௭௮௯",
 }
 
 
diff --git a/xnum/params.py b/xnum/params.py
index d06aa27..0e7f07d 100644
--- a/xnum/params.py
+++ b/xnum/params.py
@@ -76,6 +76,7 @@
 AHOM_DIGITS = ['𑜰', '𑜱', '𑜲', '𑜳', '𑜴', '𑜵', '𑜶', '𑜷', '𑜸', '𑜹']
 WARANG_CITI_DIGITS = ['𑣠', '𑣡', '𑣢', '𑣣', '𑣤', '𑣥', '𑣦', '𑣧', '𑣨', '𑣩']
 BHAIKSUKI_DIGITS = ['𑱐', '𑱑', '𑱒', '𑱓', '𑱔', '𑱕', '𑱖', '𑱗', '𑱘', '𑱙']
+TAMIL_DIGITS = ['௦', '௧', '௨', '௩', '௪', '௫', '௬', '௭', '௮', '௯']
 
 NUMERAL_MAPS = {
     "english": ENGLISH_DIGITS,
@@ -150,6 +151,7 @@
     "ahom": AHOM_DIGITS,
     "warang_citi": WARANG_CITI_DIGITS,
     "bhaiksuki": BHAIKSUKI_DIGITS,
+    "tamil": TAMIL_DIGITS,
 }
 
 ALL_DIGIT_MAPS = {}
@@ -233,6 +235,7 @@ class NumeralSystem(Enum):
     AHOM = "ahom"
     WARANG_CITI = "warang_citi"
     BHAIKSUKI = "bhaiksuki"
+    TAMIL = "tamil"
     AUTO = "auto"