diff --git a/.github/workflows/miri.yml b/.github/workflows/miri.yml
index ef14500..037d21c 100644
--- a/.github/workflows/miri.yml
+++ b/.github/workflows/miri.yml
@@ -22,7 +22,7 @@ jobs:
     - name: Setup Rust nightly with Miri
       uses: actions-rust-lang/setup-rust-toolchain@v2.0.0
       with:
-        toolchain: nightly-2026-09-25
+        toolchain: nightly-2026-09-26
         components: miri
         cache: true
     # Miri's generated sysroot manifest has an unused dependency. Build only
@@ -52,7 +52,7 @@ jobs:
     - name: Setup Rust nightly with Miri
       uses: actions-rust-lang/setup-rust-toolchain@v2.0.0
       with:
-        toolchain: nightly-2026-09-25
+        toolchain: nightly-2026-09-26
         components: miri
         cache: true
     # Miri's generated sysroot manifest has an unused dependency. Build only