diff --git a/.evergreen/scripts/setup-dev-env.sh b/.evergreen/scripts/setup-dev-env.sh
index 6e6b5965bd..38824f32b7 100755
--- a/.evergreen/scripts/setup-dev-env.sh
+++ b/.evergreen/scripts/setup-dev-env.sh
@@ -47,13 +47,13 @@ if [ -f $HOME/.visualStudioEnv.sh ]; then
   SSH_TTY=1 source $HOME/.visualStudioEnv.sh
   set -u
 fi
-uv sync --frozen
+uv sync
 
 echo "Setting up python environment... done."
 
 # Ensure there is a pre-commit hook if there is a git checkout.
 if [ -d .git ] && [ ! -f .git/hooks/pre-commit ]; then
-    uv run --frozen pre-commit install
+    uv run pre-commit install
 fi
 
 popd > /dev/null
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ac129f95f0..d2b9d9a17a 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -105,12 +105,6 @@ repos:
     # - test/test_client.py:188: te ==> the, be, we, to
     args: ["-L", "fle,fo,infinit,isnt,nin,te,aks"]
 
-- repo: https://github.com/astral-sh/uv-pre-commit
-  # uv version.
-  rev: 0.8.17
-  hooks:
-    - id: uv-lock
-
 - repo: local
   hooks:
   - id: executable-shell
@@ -128,3 +122,14 @@ repos:
     language: python
     require_serial: true
     additional_dependencies: ["shrub.py>=3.10.0", "pyyaml>=6.0.2"]
+
+  - id: uv-lock
+    name: uv-lock
+    entry: uv lock
+    language: python
+    require_serial: true
+    files: ^(uv\.lock|pyproject\.toml|requirements.txt|requirements/.*\.txt)$
+    pass_filenames: false
+    fail_fast: true
+    additional_dependencies:
+      - "uv>=0.8.4"
diff --git a/justfile b/justfile
index c129b2c199..4645a4a47d 100644
--- a/justfile
+++ b/justfile
@@ -1,7 +1,5 @@
 # See https://just.systems/man/en/ for instructions
 set shell := ["bash", "-c"]
-# Do not modify the lock file when running justfile commands.
-export UV_FROZEN := "1"
 
 # Commonly used command segments.
 typing_run := "uv run --group typing --extra aws --extra encryption --extra ocsp --extra snappy --extra test --extra zstd"
@@ -16,7 +14,7 @@ default:
 
 [private]
 resync:
- @uv sync --quiet --frozen
+ @uv sync --quiet
 
 install:
    bash .evergreen/scripts/setup-dev-env.sh
diff --git a/uv.lock b/uv.lock
index ce0367e872..5a7279e1ef 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1309,7 +1309,7 @@ requires-dist = [
     { name = "furo", marker = "extra == 'docs'", specifier = "==2025.7.19" },
     { name = "importlib-metadata", marker = "python_full_version < '3.13' and extra == 'test'", specifier = ">=7.0" },
     { name = "pykerberos", marker = "os_name != 'nt' and extra == 'gssapi'" },
-    { name = "pymongo-auth-aws", marker = "extra == 'aws'", specifier = ">=1.1.0,<2.0.0" },
+    { name = "pymongo-auth-aws", marker = "extra == 'aws'", specifier = ">=1.1.1,<2.0.0" },
     { name = "pymongo-auth-aws", marker = "extra == 'encryption'", specifier = ">=1.1.0,<2.0.0" },
     { name = "pymongocrypt", marker = "extra == 'encryption'", specifier = ">=1.13.0,<2.0.0" },
     { name = "pyopenssl", marker = "extra == 'ocsp'", specifier = ">=17.2.0" },