diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index cebdd8d8..a8b73de8 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -73,7 +73,7 @@ jobs:
           toolchain: stable
           components: rustfmt
       - name: cargo-semver-checks
-        uses: obi1kenobi/cargo-semver-checks-action@5b298c9520f7096a4683c0bd981a7ac5a7e249ae # tag=v2.8
+        uses: obi1kenobi/cargo-semver-checks-action@6b69fcf40e9b5fb17adeb57e4b6ecd020649a239 # tag=v2.9
   doc:
     # run docs generation on nightly rather than stable. This enables features like
     # https://doc.rust-lang.org/beta/unstable-book/language-features/doc-cfg.html which allows an
@@ -106,7 +106,7 @@ jobs:
         with:
           toolchain: stable
       - name: cargo install cargo-hack
-        uses: taiki-e/install-action@1ed3272338f573e042a2e6bca3893aa19f43b47a # tag=v2.71.3
+        uses: taiki-e/install-action@7769b73c2ec98c38dfcf2e18c83cfd4880c038c1 # tag=v2.75.27
         with:
           tool: cargo-hack
       # intentionally no target specifier; see https://github.com/jonhoo/rust-ci-conf/pull/4
@@ -130,7 +130,7 @@ jobs:
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # branch=master
         with:
           toolchain: ${{ matrix.msrv }}
-      - uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # tag=v5.0.4
+      - uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # tag=v5.0.5
         with:
           path: ~/.cargo
           key: ${{ runner.os }}-cargo
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 71ce0ae0..29884db6 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -141,7 +141,7 @@ jobs:
           toolchain: stable
           components: llvm-tools-preview
       - name: cargo install cargo-llvm-cov
-        uses: taiki-e/install-action@1ed3272338f573e042a2e6bca3893aa19f43b47a # tag=v2.71.3
+        uses: taiki-e/install-action@7769b73c2ec98c38dfcf2e18c83cfd4880c038c1 # tag=v2.75.27
         with:
           tool: cargo-llvm-cov
       - name: cargo generate-lockfile