diff --git a/pyproject.toml b/pyproject.toml
index 0cbf8cc1..c2475c2c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,7 @@ dependencies = [
   "psycopg2-binary>=2.9.10",
   "pyasn1==0.6.2",
   "pyasn1-modules==0.4.2",
-  "pycparser==2.23",
+  "pycparser==3.0",
   "pydantic==2.12.5",
   "pydantic-core==2.41.5",
   "pygments==2.19.2",
diff --git a/requirements.txt b/requirements.txt
index 24cd75ff..8217fb22 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1140,9 +1140,9 @@ pyasn1-modules==0.4.2 \
     # via
     #   google-auth
     #   ocotilloapi
-pycparser==2.23 \
-    --hash=sha256:78816d4f24add8f10a06d6f05b4d424ad9e96cfebf68a4ddc99c65c0720d00c2 \
-    --hash=sha256:e5c6e8d3fbad53479cab09ac03729e0a9faf2bee3db8208a550daf5af81a5934
+pycparser==3.0 \
+    --hash=sha256:600f49d217304a5902ac3c37e1281c9fe94e4d0489de643a9504c5cdfdfc6b29 \
+    --hash=sha256:b727414169a36b7d524c1c3e31839a521725078d7b2ff038656844266160a992
     # via
     #   cffi
     #   ocotilloapi
diff --git a/uv.lock b/uv.lock
index eb03c232..e1e6928d 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1564,7 +1564,7 @@ requires-dist = [
     { name = "psycopg2-binary", specifier = ">=2.9.10" },
     { name = "pyasn1", specifier = "==0.6.2" },
     { name = "pyasn1-modules", specifier = "==0.4.2" },
-    { name = "pycparser", specifier = "==2.23" },
+    { name = "pycparser", specifier = "==3.0" },
     { name = "pydantic", specifier = "==2.12.5" },
     { name = "pydantic-core", specifier = "==2.41.5" },
     { name = "pygeoapi", specifier = "==0.22.0" },
@@ -2030,11 +2030,11 @@ wheels = [
 
 [[package]]
 name = "pycparser"
-version = "2.23"
+version = "3.0"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/fe/cf/d2d3b9f5699fb1e4615c8e32ff220203e43b248e1dfcc6736ad9057731ca/pycparser-2.23.tar.gz", hash = "sha256:78816d4f24add8f10a06d6f05b4d424ad9e96cfebf68a4ddc99c65c0720d00c2", size = 173734, upload-time = "2025-09-09T13:23:47.91Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/1b/7d/92392ff7815c21062bea51aa7b87d45576f649f16458d78b7cf94b9ab2e6/pycparser-3.0.tar.gz", hash = "sha256:600f49d217304a5902ac3c37e1281c9fe94e4d0489de643a9504c5cdfdfc6b29", size = 103492, upload-time = "2026-01-21T14:26:51.89Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/a0/e3/59cd50310fc9b59512193629e1984c1f95e5c8ae6e5d8c69532ccc65a7fe/pycparser-2.23-py3-none-any.whl", hash = "sha256:e5c6e8d3fbad53479cab09ac03729e0a9faf2bee3db8208a550daf5af81a5934", size = 118140, upload-time = "2025-09-09T13:23:46.651Z" },
+    { url = "https://files.pythonhosted.org/packages/0c/c3/44f3fbbfa403ea2a7c779186dc20772604442dde72947e7d01069cbe98e3/pycparser-3.0-py3-none-any.whl", hash = "sha256:b727414169a36b7d524c1c3e31839a521725078d7b2ff038656844266160a992", size = 48172, upload-time = "2026-01-21T14:26:50.693Z" },
 ]
 
 [[package]]