diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b46d23a..1945606 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
         os: ['ubuntu-20.04', 'ubuntu-22.04', 'ubuntu-24.04', 'macos-13', 'macos-14', 'macos-15', 'windows-2019', 'windows-2022']
 
     runs-on: ${{ matrix.os }}
diff --git a/requirements-dev.txt b/requirements-dev.txt
index d4254a8..7115872 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,5 @@
 build
 packaging>=21.3
+requests-toolbelt
 twine
 vermin