diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6e63ff1..0940495 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -85,7 +85,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@master
         with:
           components: cargo
-          toolchain: 1.86.0  # CURRENT DEVELOPMENT RUST TOOLCHAIN
+          toolchain: 1.87.0  # CURRENT DEVELOPMENT RUST TOOLCHAIN
       - name: Check out ci repo
         uses: actions/checkout@v4
         with:
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 04e6dec..33a6afb 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -30,7 +30,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@master
         with:
           components: cargo
-          toolchain: 1.86.0  # CURRENT DEVELOPMENT RUST TOOLCHAIN
+          toolchain: 1.87.0  # CURRENT DEVELOPMENT RUST TOOLCHAIN
       - name: Check out ci repo
         uses: actions/checkout@v4
         with:
@@ -53,4 +53,4 @@ jobs:
         uses: obi1kenobi/cargo-semver-checks-action@v2
         with:
           verbose: true
-          rust-toolchain: 1.86.0  # CURRENT DEVELOPMENT RUST TOOLCHAIN
+          rust-toolchain: 1.87.0  # CURRENT DEVELOPMENT RUST TOOLCHAIN