diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 8cec6a63d7..139e3d9298 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -117,7 +117,7 @@ jobs:
       - name: Cache nf-test installation
         if: env.nftest_installed != 'true'
         id: cache-software
-        uses: actions/cache@v3
+        uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4
         with:
           path: |
             /usr/local/bin/nf-test
diff --git a/.github/workflows/rich-codex.yml b/.github/workflows/rich-codex.yml
index e0981e8241..ecbae8ffec 100644
--- a/.github/workflows/rich-codex.yml
+++ b/.github/workflows/rich-codex.yml
@@ -19,7 +19,7 @@ jobs:
 
       - name: Cache nf-test installation
         id: cache-software
-        uses: actions/cache@v3
+        uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4
         with:
           path: |
             /usr/local/bin/nf-test
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8cc72b0b9..1e98986191 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,7 @@
 - Fix Renovate Dockerfile updating issues ([#2648](https://github.com/nf-core/tools/pull/2648) and [#2651](https://github.com/nf-core/tools/pull/2651))
 - Add new subcommand `nf-core tui`, which launches a TUI (terminal user interface) to intuitively explore the command line flags, built using [Trogon](https://github.com/Textualize/trogon) ([#2655](https://github.com/nf-core/tools/pull/2655))
 - Update pre-commit hook astral-sh/ruff-pre-commit to v0.1.13 ([#2660](https://github.com/nf-core/tools/pull/2660))
+- Update actions/cache action to v4 ([#2666](https://github.com/nf-core/tools/pull/2666))
 
 # [v2.11.1 - Magnesium Dragon Patch](https://github.com/nf-core/tools/releases/tag/2.11) - [2023-12-20]