diff --git a/.gn b/.gn
index f20251b..f528034 100644
--- a/.gn
+++ b/.gn
@@ -25,9 +25,6 @@
   pw_build_PIP_CONSTRAINTS = [
     # Pigweed upstream constraints
     "$dir_pw_env_setup/py/pw_env_setup/virtualenv_setup/constraint.list",
-
-    # Experimental specific constraints
-    "//tools/constraint.list",
   ]
 
   pw_build_PIP_REQUIREMENTS = [
diff --git a/pw_graphics/py/pw_graphics/png2cc.py b/pw_graphics/py/pw_graphics/png2cc.py
index d4e1a0a..4201dbf 100755
--- a/pw_graphics/py/pw_graphics/png2cc.py
+++ b/pw_graphics/py/pw_graphics/png2cc.py
@@ -20,7 +20,7 @@
 import math
 from pathlib import Path
 
-from PIL import Image  # type: ignore
+from PIL import Image
 from jinja2 import Environment, DictLoader, make_logging_undefined
 
 jinja_templates = {
@@ -75,7 +75,7 @@
 
 
 def render_rgb565_header(
-    alpha_composite: Image,
+    alpha_composite: Image.Image,
     tile_width: int,
     tile_height: int,
     sprite_width: int,
@@ -102,7 +102,7 @@
 
 
 def render_font_header(
-    alpha_composite: Image,
+    alpha_composite: Image.Image,
     tile_width: int,
     tile_height: int,
     sprite_width: int,
diff --git a/tools/constraint.list b/tools/constraint.list
deleted file mode 100644
index f8018c0..0000000
--- a/tools/constraint.list
+++ /dev/null
@@ -1,4 +0,0 @@
-# //applications/tls_example/trust_store/py
-pyOpenSSL==22.0.0
-# //pw_graphics/py
-Pillow==9.4.0
diff --git a/tools/requirements.txt b/tools/requirements.txt
index f99133c..ed769d5 100644
--- a/tools/requirements.txt
+++ b/tools/requirements.txt
@@ -15,4 +15,5 @@
 # //applications/tls_example/trust_store/py
 pyOpenSSL==22.0.0
 # //pw_graphics/py
-Pillow==9.4.0
+Pillow==10.3.0
+types-Pillow==10.2.0.20240520