diff --git a/.circleci/config.yml b/.circleci/config.yml
index 3cb4fb4..6dc1bdc 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -100,6 +100,7 @@ workflows:
                 - "3.10"
                 - "3.11"
                 - "3.12"
+                - "3.13"
 
       - deploy:
           context: global
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 03c5b1e..fe00485 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Latest changes
 
+## 1.1.1
+
+Support Python 3.13
+
 ## 1.1.0
 
 Use uv & ruff as build infrastructure
diff --git a/pyproject.toml b/pyproject.toml
index 21a4e92..12e0e07 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "trontxsize"
-version = "1.1.0"
+version = "1.1.1"
 description = "Calculate tron transaction size (bandwidth)"
 readme = "README.md"
 license = "MIT"
@@ -20,6 +20,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
 ]
 keywords = ["tron", "trx", "bitcart", "bandwidth"]
 dependencies = ["protobuf", "base58"]
diff --git a/uv.lock b/uv.lock
index 0c2d61e..c01041e 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1091,7 +1091,7 @@ wheels = [
 
 [[package]]
 name = "trontxsize"
-version = "1.1.0"
+version = "1.1.1"
 source = { editable = "." }
 dependencies = [
     { name = "base58" },