diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 807d5b6b6..3eff72cc3 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -42,7 +42,7 @@ jobs:
           fetch-depth: 0 # need full history for merge-base + worktree
 
       - name: Install uv
-        uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86 # v5
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
 
       - name: Install ruff + ty
         run: |
@@ -170,7 +170,7 @@ jobs:
         uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
 
       - name: Install uv
-        uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86 # v5
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
 
       - name: Install ruff
         run: uv tool install ruff
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index be14f14c8..f7c5bf713 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -32,7 +32,7 @@ jobs:
         run: sudo apt-get update && sudo apt-get install -y ripgrep
 
       - name: Install uv
-        uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86  # v5
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b  # v8.1.0
 
       - name: Set up Python 3.11
         run: uv python install 3.11
@@ -64,7 +64,7 @@ jobs:
         run: sudo apt-get update && sudo apt-get install -y ripgrep
 
       - name: Install uv
-        uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86  # v5
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b  # v8.1.0
 
       - name: Set up Python 3.11
         run: uv python install 3.11
diff --git a/.github/workflows/uv-lockfile-check.yml b/.github/workflows/uv-lockfile-check.yml
index 190a16253..f2cc3b7c6 100644
--- a/.github/workflows/uv-lockfile-check.yml
+++ b/.github/workflows/uv-lockfile-check.yml
@@ -74,7 +74,7 @@ jobs:
         uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
 
       - name: Install uv
-        uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86  # v5
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b  # v8.1.0
 
       # `uv lock --check` re-resolves the project from pyproject.toml and
       # compares the result to uv.lock, exiting non-zero if they disagree.