diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fb05564..ea21ab8 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -12,12 +12,12 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         include:
           - os: macos-latest
-            python-version: "3.12"
+            python-version: "3.13"
           - os: windows-latest
-            python-version: "3.12"
+            python-version: "3.13"
 
     runs-on: ${{ matrix.os }}
     defaults:
diff --git a/pyproject.toml b/pyproject.toml
index 08fb6e6..c784856 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,6 +19,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
 ]
 requires-python = ">=3.9"
 dependencies = [
@@ -29,6 +30,7 @@ dependencies = [
     "numba ; platform_system == 'Windows'",
     "numpy >= 1.15",
     "pandas >= 0.23",
+    "pillow >= 10.4.0",
     "rasterio >= 1.0.0",
     "scipy >= 1.0.0",
     "transonic >= 0.6.4",