diff --git a/.github/workflows/rust-ci.yml b/.github/workflows/rust-ci.yml
index f464dc9f4..07dbe68fc 100644
--- a/.github/workflows/rust-ci.yml
+++ b/.github/workflows/rust-ci.yml
@@ -63,7 +63,7 @@ jobs:
         working-directory: .
         shell: bash
         run: bash .github/scripts/check-release-build-config.sh
-      - uses: dtolnay/rust-toolchain@1.93.0
+      - uses: dtolnay/rust-toolchain@1.100
         with:
           components: rustfmt
       - name: cargo fmt
@@ -79,7 +79,7 @@ jobs:
         working-directory: codex-rs
     steps:
       - uses: actions/checkout@v6
-      - uses: dtolnay/rust-toolchain@1.93.0
+      - uses: dtolnay/rust-toolchain@1.100
       - uses: taiki-e/install-action@44c6d64aa62cd779e873306675c7a58e86d6d532 # v2
         with:
           tool: cargo-shear@1.5.1
@@ -131,7 +131,7 @@ jobs:
             fi
             sudo DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends "${packages[@]}"
           fi
-      - uses: dtolnay/rust-toolchain@1.93.0
+      - uses: dtolnay/rust-toolchain@1.100
         with:
           targets: ${{ matrix.target }}
           components: clippy
@@ -426,7 +426,7 @@ jobs:
       - name: Install DotSlash
         uses: facebook/install-dotslash@v2
 
-      - uses: dtolnay/rust-toolchain@1.93.0
+      - uses: dtolnay/rust-toolchain@1.100
         with:
           targets: ${{ matrix.target }}
 
diff --git a/.github/workflows/rust-release-windows.yml b/.github/workflows/rust-release-windows.yml
index e64ab5e27..13e16a1ab 100644
--- a/.github/workflows/rust-release-windows.yml
+++ b/.github/workflows/rust-release-windows.yml
@@ -82,7 +82,7 @@ jobs:
           Write-Host "Total RAM: $ramGiB GiB"
           Write-Host "Disk usage:"
           Get-PSDrive -PSProvider FileSystem | Format-Table -AutoSize Name, @{Name='Size(GB)';Expression={[math]::Round(($_.Used + $_.Free) / 1GB, 1)}}, @{Name='Free(GB)';Expression={[math]::Round($_.Free / 1GB, 1)}}
-      - uses: dtolnay/rust-toolchain@1.93.0
+      - uses: dtolnay/rust-toolchain@1.100
         with:
           targets: ${{ matrix.target }}
 
diff --git a/.github/workflows/rust-release.yml b/.github/workflows/rust-release.yml
index 2ad852597..1db65af2a 100644
--- a/.github/workflows/rust-release.yml
+++ b/.github/workflows/rust-release.yml
@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: dtolnay/rust-toolchain@1.92
+      - uses: dtolnay/rust-toolchain@1.100
       - name: Validate tag matches Cargo.toml version
         shell: bash
         run: |
@@ -131,7 +131,7 @@ jobs:
             sudo apt-get update -y
             sudo DEBIAN_FRONTEND=noninteractive apt-get install -y libubsan1
           fi
-      - uses: dtolnay/rust-toolchain@1.93.0
+      - uses: dtolnay/rust-toolchain@1.100
         with:
           targets: ${{ matrix.target }}
 
@@ -448,7 +448,7 @@ jobs:
           sudo apt-get update -y
           sudo DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends pkg-config libcap-dev binutils
 
-      - uses: dtolnay/rust-toolchain@1.93.0
+      - uses: dtolnay/rust-toolchain@1.100
         with:
           targets: ${{ env.TARGET }}
 
diff --git a/.github/workflows/sdk.yml b/.github/workflows/sdk.yml
index aa6113bbe..266f5141b 100644
--- a/.github/workflows/sdk.yml
+++ b/.github/workflows/sdk.yml
@@ -31,7 +31,7 @@ jobs:
           node-version: 22
           cache: pnpm
 
-      - uses: dtolnay/rust-toolchain@1.93.0
+      - uses: dtolnay/rust-toolchain@1.100
 
       - name: build codex
         run: cargo build --bin codex