diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9653a52..ddeed59 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@1.86.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Install nightly rustfmt
         uses: dtolnay/rust-toolchain@nightly
@@ -38,7 +38,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@1.86.0
+        uses: dtolnay/rust-toolchain@1.100.0
         with:
           components: clippy
 
@@ -116,7 +116,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@1.86.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Install cargo-audit
         run: cargo install cargo-audit
@@ -146,7 +146,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@1.86.0
+        uses: dtolnay/rust-toolchain@1.100.0
         with:
           targets: ${{ matrix.target }}
 
diff --git a/.github/workflows/deps.yml b/.github/workflows/deps.yml
index 93732ec..12c925c 100644
--- a/.github/workflows/deps.yml
+++ b/.github/workflows/deps.yml
@@ -22,7 +22,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@1.86.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Install cargo-audit
         run: cargo install cargo-audit
@@ -79,7 +79,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@1.86.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Install cargo-outdated
         run: cargo install cargo-outdated
@@ -123,7 +123,7 @@ jobs:
         uses: dtolnay/rust-toolchain@nightly
 
       - name: Install Rust stable
-        uses: dtolnay/rust-toolchain@1.86.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Generate minimal lockfile
         run: |
@@ -146,7 +146,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install MSRV toolchain
-        uses: dtolnay/rust-toolchain@1.70.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Cache Cargo registry
         uses: actions/cache@v4
@@ -176,7 +176,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@1.86.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Install cargo-deny
         run: cargo install cargo-deny
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3d7dbde..5889f3f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -91,7 +91,7 @@ jobs:
           echo "✅ Version consistency verified for ${{ matrix.target }}"
 
       - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@1.86.0
+        uses: dtolnay/rust-toolchain@1.100.0
         with:
           targets: ${{ matrix.target }}