diff --git a/CHANGELOG.md b/CHANGELOG.md
index db8a184..cc5f34e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.9.0 (2026-05-06)
+
+- (PR #275, 2026-05-06) chore(deps): Restrict python version to <3.11
+
 ## 1.8.0 (2026-05-06)
 
 - (PR #225, 2025-05-20) chore: Bump setuptools from 75.8.2 to 78.1.1
diff --git a/pyproject.toml b/pyproject.toml
index 8f7e0d7..d3832bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ build-backend = "setuptools.build_meta"
 name = "pe-sunat"
 # version = ""
 dependencies = []
-requires-python = ">=3.9"
+requires-python = ">=3.9, <3.11"
 authors = [
   {name = "Cordada SpA", email = "no-reply@cordada.com"},
 ]
diff --git a/src/cordada/pe_sunat/__init__.py b/src/cordada/pe_sunat/__init__.py
index be82826..aa1af6a 100644
--- a/src/cordada/pe_sunat/__init__.py
+++ b/src/cordada/pe_sunat/__init__.py
@@ -2,4 +2,4 @@
 PE-SUNAT Python Library
 """
 
-__version__ = '1.6.0'
+__version__ = '1.9.0'