diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index b2622055..8c20bc4e 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -9,7 +9,7 @@ build:
         - asdf install uv latest
         - asdf global uv latest
     install:
-        - cd bindings/python && uv sync --no-install-project --group docs
+        - cd bindings/python && uv sync --no-install-project --frozen --group docs
     build:
         html:
-          - cd bindings/python && uv run --no-project sphinx-build -c docs -T -b html docs $READTHEDOCS_OUTPUT/html
+          - cd bindings/python && uv run --no-project --frozen sphinx-build -c docs -T -b html docs $READTHEDOCS_OUTPUT/html
diff --git a/bindings/python/CHANGELOG.md b/bindings/python/CHANGELOG.md
index d709f213..f573844a 100644
--- a/bindings/python/CHANGELOG.md
+++ b/bindings/python/CHANGELOG.md
@@ -3,6 +3,10 @@
 
 ---
 
+# Changes in Version 1.8.0 (2025/MM/YY)
+
+- Add support for PyArrow 20.0.
+
 # Changes in Version 1.7.2 (2025/04/23)
 
 - Fix handling of empty embedded arrays.
diff --git a/bindings/python/justfile b/bindings/python/justfile
index b63cc816..9d3f3b45 100644
--- a/bindings/python/justfile
+++ b/bindings/python/justfile
@@ -7,7 +7,7 @@ default:
   @just --list
 
 build-libbson:
-    uv sync --no-install-project --dev
+    uv sync --no-install-project --dev --frozen
     bash build-libbson.sh
 
 import-check:
@@ -27,18 +27,18 @@ test *args:
     uv run pytest {{args}}
 
 lint:
-    uv sync --no-install-project --dev
+    uv sync --no-install-project --dev --frozen
     uv run --no-project pre-commit run --hook-stage manual --all-files
     uv run --no-project  check-manifest -v
 
 docs:
-    uv sync --no-install-project --group docs
+    uv sync --no-install-project --group docs --frozen
     uv run --no-project sphinx-build -T -b html {{sphinx_opts}} {{docs_build}}/html
 
 docs-serve:
-    uv sync --no-install-project --group docs --group dev
+    uv sync --no-install-project --group docs --group dev --frozen
     urn run --no-project sphinx-autobuild --watch ./pymongoarrow docs {{docs_build}}/html
 
 docs-linkcheck *args:
-    uv sync --no-install-project --group docs
+    uv sync --no-install-project --group docs --frozen
     PYTHONHASHSEED=0 uv run --no-project python -m sphinx -q -b linkcheck docs {{docs_build}}/linkcheck {{args}}
diff --git a/bindings/python/pymongoarrow/types.py b/bindings/python/pymongoarrow/types.py
index 9e24df5e..89e14444 100644
--- a/bindings/python/pymongoarrow/types.py
+++ b/bindings/python/pymongoarrow/types.py
@@ -67,10 +67,10 @@ class _BsonArrowTypes(enum.Enum):
 
 
 class BSONExtensionScalar(ExtensionScalar):
-    def as_py(self):
+    def as_py(self, *args, **kwargs):
         if self.value is None:
             return None
-        return self._bson_class(self.value.as_py())
+        return self._bson_class(self.value.as_py(*args, **kwargs))
 
 
 class ObjectIdScalar(BSONExtensionScalar):
@@ -101,10 +101,10 @@ def __arrow_ext_deserialize__(self, storage_type, serialized):
 
 
 class Decimal128Scalar(ExtensionScalar):
-    def as_py(self):
+    def as_py(self, *args, **kwargs):
         if self.value is None:
             return None
-        return Decimal128.from_bid(self.value.as_py())
+        return Decimal128.from_bid(self.value.as_py(*args, **kwargs))
 
 
 class Decimal128Type(ExtensionType):
@@ -131,11 +131,11 @@ def __arrow_ext_deserialize__(self, storage_type, serialized):
 
 
 class BinaryScalar(ExtensionScalar):
-    def as_py(self):
+    def as_py(self, *args, **kwargs):
         value = self.value
         if value is None:
             return None
-        return Binary(self.value.as_py(), self.type.subtype)
+        return Binary(self.value.as_py(*args, **kwargs), self.type.subtype)
 
 
 class BinaryType(ExtensionType):
diff --git a/bindings/python/pyproject.toml b/bindings/python/pyproject.toml
index ec4cf490..8a007fca 100644
--- a/bindings/python/pyproject.toml
+++ b/bindings/python/pyproject.toml
@@ -6,7 +6,7 @@ requires = [
     # Needed for numpy headers.
     "numpy>=2.0",
     # Must be kept in sync with "project.dependencies" below.
-    "pyarrow>=19.0,<19.1.0",
+    "pyarrow>=20.0,<20.1.0",
 ]
 
 [project]
@@ -37,7 +37,7 @@ readme = "README.md"
 requires-python = ">=3.9"
 dependencies = [
     # Must be kept in sync with "build_sytem.requires" above.
-    "pyarrow >=19.0,<19.1",
+    "pyarrow >=20.0,<20.1",
     "pymongo >=4.4,<5",
     "pandas >=1.3.5,<3",
     "packaging >=23.2",