diff --git a/pyproject.toml b/pyproject.toml
index ef3407b..98a3f69 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,7 +47,7 @@ dev = [
     # in the same commit.
     "ruff>=0.15,<0.16",
     "mypy>=1.10,<2",
-    "types-PyYAML>=6.0,<7",
+    "types-PyYAML>=6.0.12.20260906,<7",
     "types-requests>=2.31,<3",
     "scipy-stubs>=1.11,<2",
     "scipy>=1.11,<2",
diff --git a/uv.lock b/uv.lock
index db0bb3e..cc08113 100644
--- a/uv.lock
+++ b/uv.lock
@@ -187,7 +187,7 @@ requires-dist = [
     { name = "scipy", marker = "extra == 'dev'", specifier = ">=1.11,<2" },
     { name = "scipy-stubs", marker = "extra == 'dev'", specifier = ">=1.11,<2" },
     { name = "tiktoken", specifier = ">=0.7,<1" },
-    { name = "types-pyyaml", marker = "extra == 'dev'", specifier = ">=6.0,<7" },
+    { name = "types-pyyaml", marker = "extra == 'dev'", specifier = ">=6.0.12.20260906,<7" },
     { name = "types-requests", marker = "extra == 'dev'", specifier = ">=2.31,<3" },
 ]
 provides-extras = ["dev"]
@@ -666,7 +666,7 @@ resolution-markers = [
     "python_full_version < '3.12'",
 ]
 dependencies = [
-    { name = "numpy", marker = "python_full_version < '3.12'" },
+    { name = "numpy" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/42/5f/29fd5f29b0a5d96e2def96ecba3112fc330ecd16e8c97c2b332563c5e201/numpy_typing_compat-20251206.2.4.tar.gz", hash = "sha256:59882d23aaff054a2536da80564012cdce33487657be4d79c5925bb8705fcabc", size = 5011, upload-time = "2025-12-06T20:02:04.942Z" }
 wheels = [
@@ -681,7 +681,7 @@ resolution-markers = [
     "python_full_version >= '3.12'",
 ]
 dependencies = [
-    { name = "numpy", marker = "python_full_version >= '3.12'" },
+    { name = "numpy" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/fc/73/e331473d3db84a8e8883ac07bfd63a8ce9eb7196acbb672bda1f5b8d3294/numpy_typing_compat-20260602.2.4.tar.gz", hash = "sha256:e4eb661f312a7ad5805677967d5879e04fd7b97627fe910121ce7b1f43aa748c", size = 4603, upload-time = "2026-06-02T15:52:38.572Z" }
 wheels = [
@@ -715,7 +715,7 @@ resolution-markers = [
     "python_full_version < '3.12'",
 ]
 dependencies = [
-    { name = "typing-extensions", marker = "python_full_version < '3.12'" },
+    { name = "typing-extensions" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/9b/86/e6f1f6f3487492dfcf3b7a2d4e2534d27af6ac05b364b276706906c34865/optype-0.17.1.tar.gz", hash = "sha256:07bfa32b795dea28fba8605a6288d36370d072f25183fb9c29b5a90f4b6f5638", size = 53572, upload-time = "2026-05-17T22:13:28.725Z" }
 wheels = [
@@ -724,8 +724,8 @@ wheels = [
 
 [package.optional-dependencies]
 numpy = [
-    { name = "numpy", marker = "python_full_version < '3.12'" },
-    { name = "numpy-typing-compat", version = "20251206.2.4", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.12'" },
+    { name = "numpy" },
+    { name = "numpy-typing-compat", version = "20251206.2.4", source = { registry = "https://pypi.org/simple" } },
 ]
 
 [[package]]
@@ -736,7 +736,7 @@ resolution-markers = [
     "python_full_version >= '3.12'",
 ]
 dependencies = [
-    { name = "typing-extensions", marker = "python_full_version == '3.12.*'" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/99/51/51dc9b1009e020f44703933d4d1ee3429c647c026ce7806b37ee2b257998/optype-0.18.0.tar.gz", hash = "sha256:ea10dee61b15ca299ed0d97025d362585c4dfc5481159bb999a1d0d414bbcb04", size = 59967, upload-time = "2026-06-07T22:13:17.534Z" }
 wheels = [
@@ -745,8 +745,8 @@ wheels = [
 
 [package.optional-dependencies]
 numpy = [
-    { name = "numpy", marker = "python_full_version >= '3.12'" },
-    { name = "numpy-typing-compat", version = "20260602.2.4", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.12'" },
+    { name = "numpy" },
+    { name = "numpy-typing-compat", version = "20260602.2.4", source = { registry = "https://pypi.org/simple" } },
 ]
 
 [[package]]
@@ -1128,7 +1128,7 @@ resolution-markers = [
     "python_full_version < '3.12'",
 ]
 dependencies = [
-    { name = "optype", version = "0.17.1", source = { registry = "https://pypi.org/simple" }, extra = ["numpy"], marker = "python_full_version < '3.12'" },
+    { name = "optype", version = "0.17.1", source = { registry = "https://pypi.org/simple" }, extra = ["numpy"] },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/02/30/7a2e621918d1317ab972f797161131f2635648ad5d92baf0695dd009e4f9/scipy_stubs-1.17.1.5.tar.gz", hash = "sha256:284b1dd1dd46107a614971d170030d310cd88b2ac6b483f85285ee0ff87720bd", size = 399933, upload-time = "2026-05-25T21:34:33.6Z" }
 wheels = [
@@ -1143,7 +1143,7 @@ resolution-markers = [
     "python_full_version >= '3.12'",
 ]
 dependencies = [
-    { name = "optype", version = "0.18.0", source = { registry = "https://pypi.org/simple" }, extra = ["numpy"], marker = "python_full_version >= '3.12'" },
+    { name = "optype", version = "0.18.0", source = { registry = "https://pypi.org/simple" }, extra = ["numpy"] },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/a0/c6/c4c80bd13c0eec99121922c50cd1c72600672307b28e4ba67f636d6b298d/scipy_stubs-1.18.0.1.tar.gz", hash = "sha256:761cb35106200c90a37034d3c8120d3899d673de1e5879d3a2ac1d6816c62327", size = 410862, upload-time = "2026-07-12T21:09:29.993Z" }
 wheels = [
@@ -1249,11 +1249,11 @@ wheels = [
 
 [[package]]
 name = "types-pyyaml"
-version = "6.0.12.20260408"
+version = "6.0.12.20260906"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/74/73/b759b1e413c31034cc01ecdfb96b38115d0ab4db55a752a3929f0cd449fd/types_pyyaml-6.0.12.20260408.tar.gz", hash = "sha256:92a73f2b8d7f39ef392a38131f76b970f8c66e4c42b3125ae872b7c93b556307", size = 17735, upload-time = "2026-04-08T04:30:50.974Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/90/6e/abec85b9013db5b934b0280a6dd104904d84f7bcbaab2e2f3def87ac7463/types_pyyaml-6.0.12.20260906.tar.gz", hash = "sha256:f59c1cc05010b833d2d72287bbaa72610106b28d42d89a907313117faba85212", size = 18649, upload-time = "2026-09-06T06:35:35.362Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/1c/f0/c391068b86abb708882c6d75a08cd7d25b2c7227dab527b3a3685a3c635b/types_pyyaml-6.0.12.20260408-py3-none-any.whl", hash = "sha256:fbc42037d12159d9c801ebfcc79ebd28335a7c13b08a4cfbc6916df78fee9384", size = 20339, upload-time = "2026-04-08T04:30:50.113Z" },
+    { url = "https://files.pythonhosted.org/packages/15/c0/fc0644b7ddcfb969e95845837143cb5173ddd6e06ee4ba5fc493cd9329b7/types_pyyaml-6.0.12.20260906-py3-none-any.whl", hash = "sha256:bca893ff0d51df5c9053137d5d0e6ccd36e939a196356f1d5c16372422f5137b", size = 21282, upload-time = "2026-09-06T06:35:34.372Z" },
 ]
 
 [[package]]