diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f7b435bb..09631544 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.12", "3.13", "3.14", "3.15"]
+        python-version: ["3.12", "3.13", "3.14", "3.14t", "3.15"]
 
     steps:
       - name: Checkout Repository
diff --git a/packages/aws-sdk-signers/pyproject.toml b/packages/aws-sdk-signers/pyproject.toml
index a3e0bd47..6c65f9a3 100644
--- a/packages/aws-sdk-signers/pyproject.toml
+++ b/packages/aws-sdk-signers/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
   "Programming Language :: Python :: Implementation :: CPython",
+  "Programming Language :: Python :: Free Threading :: 2 - Beta",
   "Topic :: Software Development :: Libraries"
 ]
 
diff --git a/packages/smithy-aws-core/pyproject.toml b/packages/smithy-aws-core/pyproject.toml
index 254cfe3f..6a72200b 100644
--- a/packages/smithy-aws-core/pyproject.toml
+++ b/packages/smithy-aws-core/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
   "Programming Language :: Python :: Implementation :: CPython",
+  "Programming Language :: Python :: Free Threading :: 2 - Beta",
   "Topic :: Software Development :: Libraries"
 ]
 dependencies = [
diff --git a/packages/smithy-aws-event-stream/pyproject.toml b/packages/smithy-aws-event-stream/pyproject.toml
index 25a21926..fb75b28d 100644
--- a/packages/smithy-aws-event-stream/pyproject.toml
+++ b/packages/smithy-aws-event-stream/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
   "Programming Language :: Python :: Implementation :: CPython",
+  "Programming Language :: Python :: Free Threading :: 2 - Beta",
   "Topic :: Software Development :: Libraries"
 ]
 dependencies = [
diff --git a/packages/smithy-core/pyproject.toml b/packages/smithy-core/pyproject.toml
index a0931d29..2b54fe76 100644
--- a/packages/smithy-core/pyproject.toml
+++ b/packages/smithy-core/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
   "Programming Language :: Python :: Implementation :: CPython",
+  "Programming Language :: Python :: Free Threading :: 2 - Beta",
   "Topic :: Software Development :: Libraries"
 ]
 dependencies = []
diff --git a/packages/smithy-http/pyproject.toml b/packages/smithy-http/pyproject.toml
index 659dd88d..d8ef4523 100644
--- a/packages/smithy-http/pyproject.toml
+++ b/packages/smithy-http/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
   "Programming Language :: Python :: Implementation :: CPython",
+  "Programming Language :: Python :: Free Threading :: 2 - Beta",
   "Topic :: Software Development :: Libraries"
 ]
 dependencies = [
diff --git a/packages/smithy-json/pyproject.toml b/packages/smithy-json/pyproject.toml
index b4c113e8..146f58af 100644
--- a/packages/smithy-json/pyproject.toml
+++ b/packages/smithy-json/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
   "Programming Language :: Python :: Implementation :: CPython",
+  "Programming Language :: Python :: Free Threading :: 2 - Beta",
   "Topic :: Software Development :: Libraries"
 ]
 dependencies = [
diff --git a/packages/smithy-xml/pyproject.toml b/packages/smithy-xml/pyproject.toml
index eca3b80f..e0a939ed 100644
--- a/packages/smithy-xml/pyproject.toml
+++ b/packages/smithy-xml/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
   "Programming Language :: Python :: Implementation :: CPython",
+  "Programming Language :: Python :: Free Threading :: 2 - Beta",
   "Topic :: Software Development :: Libraries"
 ]
 dependencies = [