diff --git a/pyproject.toml b/pyproject.toml
index 3ddd63a..a82a8eb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,7 @@ extend-exclude = [
     "third_party",
 ]
 src = ["sharp"]
-target-version = "py39"
+target-version = "py312"
 
 [tool.ruff.lint.pydocstyle]
 convention = "google"
diff --git a/src/sharp/cli/render.py b/src/sharp/cli/render.py
index 1b3a23e..22c0bf8 100644
--- a/src/sharp/cli/render.py
+++ b/src/sharp/cli/render.py
@@ -87,8 +87,8 @@ def render_gaussians(
 
     intrinsics = torch.tensor(
         [
-            [f_px, 0, (width - 1) / 2., 0],
-            [0, f_px, (height - 1) / 2., 0],
+            [f_px, 0, (width - 1) / 2.0, 0],
+            [0, f_px, (height - 1) / 2.0, 0],
             [0, 0, 1, 0],
             [0, 0, 0, 1],
         ],