diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 70dda9d..f9d2c55 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,7 +43,7 @@ jobs:
     name: Check
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Delete rust-toolchain.toml
         run: rm rust-toolchain.toml
       - name: Install toolchain
@@ -65,7 +65,7 @@ jobs:
     outputs:
       rust-versions: ${{ steps.metadata.outputs.rust-versions }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - id: metadata
         run: |
           msrv=$(yq '.workspace.package.rust-version' Cargo.toml)
@@ -81,7 +81,7 @@ jobs:
         rust-version: ${{ fromJson(needs.msrv.outputs.rust-versions) }}
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Delete rust-toolchain.toml
         run: rm rust-toolchain.toml
       - name: Install toolchain
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4586af..600247b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All significant changes to this project will be documented in this file.
 
 ## Unreleased
 
+### New features
+
+* `FrequentItemsSketch` now supports borrowed-key updates via `update_ref` and `update_with_count_ref`, allowing sketches such as `FrequentItemsSketch<String>` to update from `&str` without allocating on existing-key hits. Frequency queries also accept borrowed key forms matching `Borrow<Q>`.
+
 ## v0.3.0 (2026-05-18)
 
 ### Breaking changes