diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 5140372..f3a5989 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.11"]
+        python-version: ["3.10", "3.11", "3.12"]
     steps:
       - uses: actions/checkout@v4
 
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..262751d
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools>=78.1.1,<81"]
+build-backend = "setuptools.build_meta"
diff --git a/requirements.txt b/requirements.txt
index cbeab29..843623f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,9 @@
-certifi==2022.12.7
+certifi==2026.7.22
 charset-normalizer==2.1.1
-idna==3.3
+idna==3.19
 lob==4.5.4
 python-dateutil==2.8.2
-requests==2.28.1
+requests==2.34.2
 six==1.16.0
-urllib3==1.26.12
+urllib3==2.7.0
 python-dotenv>=0.21.0
diff --git a/setup.py b/setup.py
index 21262fc..26825a4 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
 from setuptools import setup, find_packages  # noqa: H301
 
 NAME = "lob-python"
-VERSION = "5.2.0"
+VERSION = "5.2.1"
 # To install the library, run the following
 #
 # python setup.py install