diff --git a/.fernignore b/.fernignore
index 950b552..b7f362c 100644
--- a/.fernignore
+++ b/.fernignore
@@ -2,3 +2,6 @@
 
 src/agentmail/core/query_encoder.py
 tests/utils/test_query_encoding.py
+
+# Preserve the Python 3.10 CI floor across generated releases.
+.github/workflows/ci.yml
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8bca429..74af457 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
       - name: Set up python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
+          python-version: "3.10"
       - name: Bootstrap poetry
         run: |
           curl -sSL https://install.python-poetry.org | python - -y --version 1.5.1
@@ -30,7 +30,7 @@ jobs:
       - name: Set up python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
+          python-version: "3.10"
       - name: Bootstrap poetry
         run: |
           curl -sSL https://install.python-poetry.org | python - -y --version 1.5.1
@@ -50,7 +50,7 @@ jobs:
       - name: Set up python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
+          python-version: "3.10"
       - name: Bootstrap poetry
         run: |
           curl -sSL https://install.python-poetry.org | python - -y --version 1.5.1
diff --git a/README.md b/README.md
index 0240bc0..bf40680 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,9 @@ The Agentmail Python library provides convenient access to the Agentmail APIs fr
 
 ## Installation
 
+Requires Python 3.10 or newer. The minimum version supports the patched AnyIO
+TLS hostname verification used by the asynchronous HTTP client.
+
 ```sh
 pip install agentmail
 ```
diff --git a/poetry.lock b/poetry.lock
index 2e24804..ea4dd43 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.5 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.5.1 and should not be changed by hand.
 
 [[package]]
 name = "annotated-types"
@@ -11,30 +11,24 @@ files = [
     {file = "annotated_types-0.7.0.tar.gz", hash = "sha256:aff07c09a53a08bc8cfccb9c85b05f1aa9a2a6f23728d790723543408344ce89"},
 ]
 
-[package.dependencies]
-typing-extensions = {version = ">=4.0.0", markers = "python_version < \"3.9\""}
-
 [[package]]
 name = "anyio"
-version = "4.5.2"
-description = "High level compatibility layer for multiple asynchronous event loop implementations"
+version = "4.14.2"
+description = "High-level concurrency and networking framework on top of asyncio or Trio"
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.10"
 files = [
-    {file = "anyio-4.5.2-py3-none-any.whl", hash = "sha256:c011ee36bc1e8ba40e5a81cb9df91925c218fe9b778554e0b56a21e1b5d4716f"},
-    {file = "anyio-4.5.2.tar.gz", hash = "sha256:23009af4ed04ce05991845451e11ef02fc7c5ed29179ac9a420e5ad0ac7ddc5b"},
+    {file = "anyio-4.14.2-py3-none-any.whl", hash = "sha256:9f505dda5ac9f0c8309b5e8bd445a8c2bf7246f3ce950121e45ea15bc41d1494"},
+    {file = "anyio-4.14.2.tar.gz", hash = "sha256:cfa139f3ed1a23ee8f88a145ddb5ac7605b8bbfd8592baacd7ce3d8bb4313c7f"},
 ]
 
 [package.dependencies]
 exceptiongroup = {version = ">=1.0.2", markers = "python_version < \"3.11\""}
 idna = ">=2.8"
-sniffio = ">=1.1"
-typing-extensions = {version = ">=4.1", markers = "python_version < \"3.11\""}
+typing_extensions = {version = ">=4.5", markers = "python_version < \"3.13\""}
 
 [package.extras]
-doc = ["Sphinx (>=7.4,<8.0)", "packaging", "sphinx-autodoc-typehints (>=1.2.0)", "sphinx-rtd-theme"]
-test = ["anyio[trio]", "coverage[toml] (>=7)", "exceptiongroup (>=1.2.0)", "hypothesis (>=4.0)", "psutil (>=5.9)", "pytest (>=7.0)", "pytest-mock (>=3.6.1)", "trustme", "truststore (>=0.9.1)", "uvloop (>=0.21.0b1)"]
-trio = ["trio (>=0.26.1)"]
+trio = ["trio (>=0.32.0)"]
 
 [[package]]
 name = "certifi"
@@ -504,17 +498,6 @@ files = [
     {file = "six-1.17.0.tar.gz", hash = "sha256:ff70335d468e7eb6ec65b95b99d3a2836546063f63acc5171de367e834932a81"},
 ]
 
-[[package]]
-name = "sniffio"
-version = "1.3.1"
-description = "Sniff out which async library your code is running under"
-optional = false
-python-versions = ">=3.7"
-files = [
-    {file = "sniffio-1.3.1-py3-none-any.whl", hash = "sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2"},
-    {file = "sniffio-1.3.1.tar.gz", hash = "sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc"},
-]
-
 [[package]]
 name = "tomli"
 version = "2.5.0"
@@ -708,5 +691,5 @@ files = [
 
 [metadata]
 lock-version = "2.0"
-python-versions = "^3.8"
-content-hash = "997b22d5b3fdb1c542b2547ad8fbdc255dfb656b6c50d082140f482620f4e88a"
+python-versions = "^3.10"
+content-hash = "8a564fcdba39bc13100bab926cfcc9293f81512f5cfb6e180b70c97382dcdcbb"
diff --git a/pyproject.toml b/pyproject.toml
index 7991e70..3e26c07 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,8 +14,6 @@ classifiers = [
     "Intended Audience :: Developers",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -39,8 +37,10 @@ packages = [
 Repository = 'https://github.com/agentmail-to/agentmail-python'
 
 [tool.poetry.dependencies]
-python = "^3.8"
+python = "^3.10"
 httpx = ">=0.21.2"
+# Require the TLS hostname-verification fix for SDK consumers, not only the lockfile.
+anyio = ">=4.14.2"
 pydantic = ">= 1.9.2"
 pydantic-core = ">=2.18.2"
 typing_extensions = ">= 4.0.0"
diff --git a/requirements.txt b/requirements.txt
index 4c0f643..9f1a94f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 httpx>=0.21.2
+anyio>=4.14.2
 pydantic>= 1.9.2
 pydantic-core>=2.18.2
 typing_extensions>= 4.0.0