diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b8f1f3d..7fd7bdd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -87,7 +87,7 @@ jobs:
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: "1.77"  # STABLE
+        toolchain: "1.78"  # STABLE
     - uses: Swatinem/rust-cache@v2
     - name: Check documentation
       env:
@@ -102,7 +102,7 @@ jobs:
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: "1.77"  # STABLE
+        toolchain: "1.78"  # STABLE
         components: rustfmt
     - uses: Swatinem/rust-cache@v2
     - name: Check formatting
@@ -118,7 +118,7 @@ jobs:
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: "1.77"  # STABLE
+        toolchain: "1.78"  # STABLE
         components: clippy
     - uses: Swatinem/rust-cache@v2
     - name: Install SARIF tools