diff --git a/.github/workflows/benchmarks.yml b/.github/workflows/benchmarks.yml
index 32b630e..3c424ac 100644
--- a/.github/workflows/benchmarks.yml
+++ b/.github/workflows/benchmarks.yml
@@ -39,7 +39,7 @@ jobs:
           fetch-depth: 0  # Full history for git metadata
 
       - name: Setup Rust toolchain
-        uses: actions-rust-lang/setup-rust-toolchain@v1
+        uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           cache: true
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 10a85b2..dafc5a6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7
       # Ensure rustfmt is installed and setup problem matcher
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           components: rustfmt
       - name: Rustfmt Check
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           components: clippy
       - name: Run clippy
@@ -50,7 +50,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
       - name: Build
         run: cargo build --verbose
       - name: Run doc tests
@@ -71,7 +71,7 @@ jobs:
         os: [ubuntu-latest, macos-latest]
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           toolchain: nightly
           components: miri
@@ -92,7 +92,7 @@ jobs:
     needs: test
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
       - name: Run property tests with increased cases
         run: |
           PROPTEST_CASES=1000 cargo test --lib property_tests
@@ -108,7 +108,7 @@ jobs:
     if: github.event_name == 'pull_request'
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           toolchain: nightly
           cache: false
@@ -142,7 +142,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           toolchain: stable
       - name: Build documentation
@@ -166,7 +166,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
       - name: Install cargo-deny
         run: cargo install --locked cargo-deny
       - name: Run cargo-deny checks
@@ -179,7 +179,7 @@ jobs:
     if: github.ref == 'refs/heads/main'
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           toolchain: stable
       - name: Run benchmarks
@@ -191,7 +191,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           toolchain: 1.85.0  # MSRV for Rust 2024 edition
       - name: Check MSRV
diff --git a/.github/workflows/fuzz.yml b/.github/workflows/fuzz.yml
index 9e62a2f..5f19d44 100644
--- a/.github/workflows/fuzz.yml
+++ b/.github/workflows/fuzz.yml
@@ -32,7 +32,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7
 
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           toolchain: nightly
 
@@ -62,7 +62,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7
 
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           toolchain: nightly
           cache: false
@@ -191,7 +191,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7
 
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           toolchain: nightly
           cache: false
diff --git a/.github/workflows/maintenance.yml b/.github/workflows/maintenance.yml
index ccc5748..69d6566 100644
--- a/.github/workflows/maintenance.yml
+++ b/.github/workflows/maintenance.yml
@@ -19,7 +19,7 @@ jobs:
     timeout-minutes: 20
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
       - name: Install cargo-deny
         run: cargo install --locked cargo-deny
       - name: Check advisories, bans, licenses, and sources
@@ -32,6 +32,6 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v7
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
       - name: Build and test workspace
         run: cargo test --workspace --all-features --all-targets
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9aa2754..bbcbeeb 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -27,7 +27,7 @@ jobs:
             git fetch --no-tags --prune origin main
           fi
           git merge-base --is-ancestor "${GITHUB_SHA}^{}" origin/main
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v2
         with:
           components: rustfmt, clippy