diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 98834bf..4afa8dc 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -6,121 +6,121 @@
 # - hack: check combinations of feature flags
 # - msrv: check that the msrv specified in the crate is correct
 permissions:
-  contents: read
+    contents: read
 # This configuration allows maintainers of this repo to create a branch and pull request based on
 # the new branch. Restricting the push trigger to the main branch ensures that the PR only gets
 # built once.
 on:
-  push:
-    branches: [main]
-  pull_request:
+    push:
+        branches: [main]
+    pull_request:
 # If new code is pushed to a PR branch, then cancel in progress workflows for that PR. Ensures that
 # we don't waste CI time, and returns results quicker https://github.com/jonhoo/rust-ci-conf/pull/5
 concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
+    group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+    cancel-in-progress: true
 name: check
 jobs:
-  fmt:
-    runs-on: ubuntu-latest
-    name: stable / fmt
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install stable
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          components: rustfmt
-      - name: cargo fmt --check
-        run: cargo fmt --check
-  clippy:
-    runs-on: ubuntu-latest
-    name: ${{ matrix.toolchain }} / clippy
-    permissions:
-      contents: read
-      checks: write
-    strategy:
-      fail-fast: false
-      matrix:
-        # Get early warning of new lints which are regularly introduced in beta channels.
-        toolchain: [stable, beta]
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install ${{ matrix.toolchain }}
-        uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ matrix.toolchain }}
-          components: clippy
-      - name: cargo clippy
-        uses: giraffate/clippy-action@v1
-        with:
-          reporter: 'github-pr-check'
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-  semver:
-    runs-on: ubuntu-latest
-    name: semver
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install stable
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          components: rustfmt
-      - name: cargo-semver-checks
-        uses: obi1kenobi/cargo-semver-checks-action@v2
-  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
-    # API be documented as only available in some specific platforms.
-    runs-on: ubuntu-latest
-    name: nightly / doc
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install nightly
-        uses: dtolnay/rust-toolchain@nightly
-      - name: cargo doc
-        run: cargo doc --no-deps --all-features
-        env:
-          RUSTDOCFLAGS: --cfg docsrs
-  hack:
-    # cargo-hack checks combinations of feature flags to ensure that features are all additive
-    # which is required for feature unification
-    runs-on: ubuntu-latest
-    name: ubuntu / stable / features
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install stable
-        uses: dtolnay/rust-toolchain@stable
-      - name: cargo install cargo-hack
-        uses: taiki-e/install-action@cargo-hack
-      # intentionally no target specifier; see https://github.com/jonhoo/rust-ci-conf/pull/4
-      # --feature-powerset runs for every combination of features
-      - name: cargo hack
-        run: cargo hack --feature-powerset check
-  msrv:
-    # check that we can build using the minimal rust version that is specified by this crate
-    runs-on: ubuntu-latest
-    # we use a matrix here just because env can't be used in job names
-    # https://docs.github.com/en/actions/learn-github-actions/contexts#context-availability
-    strategy:
-      matrix:
-        msrv: ["1.56.1"] # 2021 edition requires 1.56
-    name: ubuntu / ${{ matrix.msrv }}
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: Install ${{ matrix.msrv }}
-        uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ matrix.msrv }}
-      - name: cargo +${{ matrix.msrv }} check
-        run: cargo check
+    fmt:
+        runs-on: ubuntu-latest
+        name: stable / fmt
+        steps:
+            - uses: actions/checkout@v4
+              with:
+                  submodules: true
+            - name: Install stable
+              uses: dtolnay/rust-toolchain@stable
+              with:
+                  components: rustfmt
+            - name: cargo fmt --check
+              run: cargo fmt --check
+    clippy:
+        runs-on: ubuntu-latest
+        name: ${{ matrix.toolchain }} / clippy
+        permissions:
+            contents: read
+            checks: write
+        strategy:
+            fail-fast: false
+            matrix:
+                # Get early warning of new lints which are regularly introduced in beta channels.
+                toolchain: [stable, beta]
+        steps:
+            - uses: actions/checkout@v4
+              with:
+                  submodules: true
+            - name: Install ${{ matrix.toolchain }}
+              uses: dtolnay/rust-toolchain@master
+              with:
+                  toolchain: ${{ matrix.toolchain }}
+                  components: clippy
+            - name: cargo clippy
+              uses: giraffate/clippy-action@v1
+              with:
+                  reporter: "github-pr-check"
+                  github_token: ${{ secrets.GITHUB_TOKEN }}
+    semver:
+        runs-on: ubuntu-latest
+        name: semver
+        steps:
+            - uses: actions/checkout@v4
+              with:
+                  submodules: true
+            - name: Install stable
+              uses: dtolnay/rust-toolchain@stable
+              with:
+                  components: rustfmt
+            - name: cargo-semver-checks
+              uses: obi1kenobi/cargo-semver-checks-action@v2
+    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
+        # API be documented as only available in some specific platforms.
+        runs-on: ubuntu-latest
+        name: nightly / doc
+        steps:
+            - uses: actions/checkout@v4
+              with:
+                  submodules: true
+            - name: Install nightly
+              uses: dtolnay/rust-toolchain@nightly
+            - name: cargo doc
+              run: cargo doc --no-deps --all-features
+              env:
+                  RUSTDOCFLAGS: --cfg docsrs
+    hack:
+        # cargo-hack checks combinations of feature flags to ensure that features are all additive
+        # which is required for feature unification
+        runs-on: ubuntu-latest
+        name: ubuntu / stable / features
+        steps:
+            - uses: actions/checkout@v4
+              with:
+                  submodules: true
+            - name: Install stable
+              uses: dtolnay/rust-toolchain@stable
+            - name: cargo install cargo-hack
+              uses: taiki-e/install-action@cargo-hack
+            # intentionally no target specifier; see https://github.com/jonhoo/rust-ci-conf/pull/4
+            # --feature-powerset runs for every combination of features
+            - name: cargo hack
+              run: cargo hack --feature-powerset check
+    msrv:
+        # check that we can build using the minimal rust version that is specified by this crate
+        runs-on: ubuntu-latest
+        # we use a matrix here just because env can't be used in job names
+        # https://docs.github.com/en/actions/learn-github-actions/contexts#context-availability
+        strategy:
+            matrix:
+                msrv: ["1.60"] # namespaced-features requires 1.60
+        name: ubuntu / ${{ matrix.msrv }}
+        steps:
+            - uses: actions/checkout@v4
+              with:
+                  submodules: true
+            - name: Install ${{ matrix.msrv }}
+              uses: dtolnay/rust-toolchain@master
+              with:
+                  toolchain: ${{ matrix.msrv }}
+            - name: cargo +${{ matrix.msrv }} check
+              run: cargo check
diff --git a/Cargo.toml b/Cargo.toml
index d91f99b..c06859e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,7 @@ keywords      = ["json-pointer", "rfc-6901", "6901"]
 license       = "MIT OR Apache-2.0"
 name          = "jsonptr"
 repository    = "https://github.com/chanced/jsonptr"
+rust-version  = "1.60"
 version       = "0.4.7"
 
 [dependencies]