diff --git a/CHANGELOG.md b/CHANGELOG.md
index aaecdb5..c82a852 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # CHANGELOG
 
+## _v2.5.3_
+
+### **Date: 08-June-2026**
+
+- Fixed security issues.
+
 ## _v2.5.2_
 
 ### **Date: 18-May-2026**
diff --git a/contentstack/__init__.py b/contentstack/__init__.py
index f2c9031..4d6b815 100644
--- a/contentstack/__init__.py
+++ b/contentstack/__init__.py
@@ -22,7 +22,7 @@
 __title__ = 'contentstack-delivery-python'
 __author__ = 'contentstack'
 __status__ = 'debug'
-__version__ = 'v2.5.2'
+__version__ = 'v2.5.3'
 __endpoint__ = 'cdn.contentstack.io'
 __email__ = 'support@contentstack.com'
 __developer_email__ = 'mobile@contentstack.com'
diff --git a/requirements.txt b/requirements.txt
index 0dd2a75..b6f9601 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ Pygments~=2.20.0
 wrapt==1.16.0
 certifi==2024.8.30
 oauthlib==3.2.2
-idna==3.10
+idna==3.15
 chardet~=5.2.0
 alabaster==0.7.16
 zipp==3.20.1