diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index afa858b64..3b99ced22 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.12"]
+        python-version: ["3.12", "3.13"]
 
     steps:
       - name: Checkout Repository
diff --git a/codegen/core/src/main/java/software/amazon/smithy/python/codegen/generators/SetupGenerator.java b/codegen/core/src/main/java/software/amazon/smithy/python/codegen/generators/SetupGenerator.java
index 16cfc70bb..0beffbe91 100644
--- a/codegen/core/src/main/java/software/amazon/smithy/python/codegen/generators/SetupGenerator.java
+++ b/codegen/core/src/main/java/software/amazon/smithy/python/codegen/generators/SetupGenerator.java
@@ -82,7 +82,8 @@ private static void writePyproject(
                         "Programming Language :: Python",
                         "Programming Language :: Python :: 3",
                         "Programming Language :: Python :: 3 :: Only",
-                        "Programming Language :: Python :: 3.12"
+                        "Programming Language :: Python :: 3.12",
+                        "Programming Language :: Python :: 3.13"
                     ]
                     """, settings.moduleName(), settings.moduleVersion(), settings.moduleDescription());
 
diff --git a/packages/aws-sdk-signers/pyproject.toml b/packages/aws-sdk-signers/pyproject.toml
index b3daa5d83..4677bd433 100644
--- a/packages/aws-sdk-signers/pyproject.toml
+++ b/packages/aws-sdk-signers/pyproject.toml
@@ -20,6 +20,7 @@ classifiers = [
   "Programming Language :: Python :: 3 :: Only",
   "Programming Language :: Python :: 3",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: Implementation :: CPython",
   "Topic :: Software Development :: Libraries"
 ]