diff --git a/.github/workflows/pr_prek.yaml b/.github/workflows/pr_prek.yaml
index 3a54e0051..478caea0f 100644
--- a/.github/workflows/pr_prek.yaml
+++ b/.github/workflows/pr_prek.yaml
@@ -7,7 +7,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  RUST_TOOLCHAIN_VERSION: "nightly-2026-07-01"
+  RUST_TOOLCHAIN_VERSION: "nightly-2026-08-23"
 
 permissions: {}
 
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 77409fc6a..b9048228f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -67,7 +67,7 @@ repos:
         name: cargo-rustfmt
         language: system
         # Pinning to a specific rustc version, so that we get consistent formatting
-        entry: cargo +nightly-2026-07-01 fmt --all -- --check
+        entry: cargo +nightly-2026-08-23 fmt --all -- --check
         stages: [pre-commit, pre-merge-commit]
         pass_filenames: false
         files: \.rs$