diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dc3bda4..7620266 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,7 @@ jobs:
           python-version: "3.14"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Sync development dependencies
         run: uv sync --group dev
diff --git a/.github/workflows/json-tstring-ci.yml b/.github/workflows/json-tstring-ci.yml
index 7d8e134..a827d53 100644
--- a/.github/workflows/json-tstring-ci.yml
+++ b/.github/workflows/json-tstring-ci.yml
@@ -35,7 +35,7 @@ jobs:
           working-directory: json-tstring
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Sync development dependencies
         run: uv sync --group dev
diff --git a/.github/workflows/publish-python.yml b/.github/workflows/publish-python.yml
index 9c94f5a..2abde14 100644
--- a/.github/workflows/publish-python.yml
+++ b/.github/workflows/publish-python.yml
@@ -145,7 +145,7 @@ jobs:
           python-version: "3.14"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Build distribution
         if: ${{ needs.resolve-target.outputs.target == 'all' || (needs.resolve-target.outputs.target == 'bootstrap-1' && matrix.publish_in_bootstrap_1) || (needs.resolve-target.outputs.target == 'bootstrap-2' && matrix.publish_in_bootstrap_2) }}
@@ -200,7 +200,7 @@ jobs:
           python-version: "3.14"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
         with:
           targets: ${{ matrix.target }}
 
@@ -256,7 +256,7 @@ jobs:
           python-version: "3.14"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Build source distribution
         run: uvx maturin sdist --manifest-path rust/python-bindings/Cargo.toml --out dist
diff --git a/.github/workflows/publish-rust.yml b/.github/workflows/publish-rust.yml
index e46f101..469b544 100644
--- a/.github/workflows/publish-rust.yml
+++ b/.github/workflows/publish-rust.yml
@@ -43,7 +43,7 @@ jobs:
         run: python3 scripts/manage_versions.py set "${{ env.RELEASE_VERSION }}"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Verify Rust crates package cleanly
         run: cargo package --allow-dirty --manifest-path rust/Cargo.toml -p tstring-syntax -p tstring-json -p tstring-toml -p tstring-yaml
@@ -63,7 +63,7 @@ jobs:
         run: python3 scripts/manage_versions.py set "${{ env.RELEASE_VERSION }}"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Publish tstring-syntax
         env:
@@ -85,7 +85,7 @@ jobs:
         run: python3 scripts/manage_versions.py set "${{ env.RELEASE_VERSION }}"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Wait for tstring-syntax to appear on crates.io
         run: python3 .github/scripts/wait_for_crate.py tstring-syntax
@@ -110,7 +110,7 @@ jobs:
         run: python3 scripts/manage_versions.py set "${{ env.RELEASE_VERSION }}"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Publish tstring-toml
         env:
@@ -132,7 +132,7 @@ jobs:
         run: python3 scripts/manage_versions.py set "${{ env.RELEASE_VERSION }}"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Publish tstring-yaml
         env:
diff --git a/.github/workflows/release-check.yml b/.github/workflows/release-check.yml
index 3afb7d4..23c03fd 100644
--- a/.github/workflows/release-check.yml
+++ b/.github/workflows/release-check.yml
@@ -39,7 +39,7 @@ jobs:
           python-version: "3.14"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Build pure Python distributions
         run: |
@@ -85,7 +85,7 @@ jobs:
           python-version: "3.14"
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
         with:
           targets: ${{ matrix.target }}
 
diff --git a/.github/workflows/toml-tstring-ci.yml b/.github/workflows/toml-tstring-ci.yml
index 3b32778..6f446e5 100644
--- a/.github/workflows/toml-tstring-ci.yml
+++ b/.github/workflows/toml-tstring-ci.yml
@@ -35,7 +35,7 @@ jobs:
           working-directory: toml-tstring
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Sync development dependencies
         run: uv sync --group dev
diff --git a/.github/workflows/yaml-tstring-ci.yml b/.github/workflows/yaml-tstring-ci.yml
index d154e57..4dfd6e4 100644
--- a/.github/workflows/yaml-tstring-ci.yml
+++ b/.github/workflows/yaml-tstring-ci.yml
@@ -35,7 +35,7 @@ jobs:
           working-directory: yaml-tstring
 
       - name: Set up Rust
-        uses: dtolnay/rust-toolchain@1.94.0
+        uses: dtolnay/rust-toolchain@1.100.0
 
       - name: Sync development dependencies
         run: uv sync --group dev