diff --git a/.convco b/.convco
new file mode 100644
index 0000000..a6f7c1e
--- /dev/null
+++ b/.convco
@@ -0,0 +1,68 @@
+header: |
+  # Changelog
+types:
+- type: feat
+  increment: Minor
+  section: Features
+  hidden: false
+- type: fix
+  increment: Patch
+  section: Fixes
+  hidden: false
+- type: build
+  increment: None
+  section: Other
+  hidden: true
+- type: chore
+  increment: None
+  section: Other
+  hidden: true
+- type: ci
+  increment: None
+  section: Other
+  hidden: true
+- type: docs
+  increment: None
+  section: Documentation
+  hidden: true
+- type: style
+  increment: None
+  section: Other
+  hidden: true
+- type: refactor
+  increment: None
+  section: Other
+  hidden: true
+- type: perf
+  increment: None
+  section: Other
+  hidden: true
+- type: test
+  increment: None
+  section: Other
+  hidden: true
+preMajor: false
+commitUrlFormat: '{{@root.host}}/{{@root.owner}}/{{@root.repository}}/commit/{{hash}}'
+compareUrlFormat: '{{@root.host}}/{{@root.owner}}/{{@root.repository}}/compare/{{previousTag}}...{{currentTag}}'
+issueUrlFormat: '{{@root.host}}/{{@root.owner}}/{{@root.repository}}/issues/{{issue}}'
+userUrlFormat: '{{host}}/{{user}}'
+releaseCommitMessageFormat: 'chore(release): {{currentTag}}'
+issuePrefixes:
+- '#'
+host: null
+owner: null
+repository: null
+template: null
+commitTemplate: null
+scopeRegex: ^[[:alnum:]]+(?:[-_/][[:alnum:]]+)*$
+lineLength: 80
+wrapDisabled: false
+linkCompare: true
+linkReferences: true
+merges: false
+firstParent: false
+stripRegex: ''
+description:
+  length:
+    min: 10
+    max: null
diff --git a/.github/workflows/essentials.yml b/.github/workflows/essentials.yml
index 2e8138c..a9679a2 100644
--- a/.github/workflows/essentials.yml
+++ b/.github/workflows/essentials.yml
@@ -9,27 +9,27 @@ on:
 
 jobs:
   test:
-    name: Test
+    name: Quality checks & tests
     runs-on: ubuntu-latest
     strategy:
       matrix:
         rust: [stable]
     steps:
       - name: Rust install
-        uses: actions-rs/toolchain@v1
+        uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
-          profile: minimal
-          override: true
           components: rustfmt, clippy
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
-          fetch-depth: ${{ github.event.pull_request.commits }}
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0
+          # fetch-depth: ${{ github.event.pull_request.commits }}
 
       - name: Cache crates from crates.io
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         continue-on-error: false
         with:
           path: |
@@ -48,35 +48,44 @@ jobs:
       - name: Quality - convco check
         run: |
           git show-ref
+          echo Commit message: "$(git log -1 --pretty=%B)"
           curl -sSfLO https://github.com/convco/convco/releases/latest/download/convco-ubuntu.zip
           unzip convco-ubuntu.zip
           chmod +x convco
-          ./convco check
+          ./convco --version
+          ./convco check -c .convco
           rm convco
 
       - name: Quality - cargo deny check
         run: |
-          curl -sSfL https://github.com/EmbarkStudios/cargo-deny/releases/download/0.14.2/cargo-deny-0.14.2-x86_64-unknown-linux-musl.tar.gz | tar zx --no-anchored cargo-deny --strip-components=1
+          curl -sSfL https://github.com/EmbarkStudios/cargo-deny/releases/download/0.16.1/cargo-deny-0.16.1-x86_64-unknown-linux-musl.tar.gz | tar zx --no-anchored cargo-deny --strip-components=1
           chmod +x cargo-deny
           mv cargo-deny ~/.cargo/bin/
           cargo deny check
 
-      - name: Install cargo check tools
+      - name: Quality - cargo audit check
+        run: |
+          curl -sSfL https://github.com/rustsec/rustsec/releases/download/cargo-audit%2Fv0.17.3/cargo-audit-x86_64-unknown-linux-musl-v0.17.3.tgz | tar zx --no-anchored cargo-audit --strip-components=1
+          chmod +x cargo-audit
+          mv cargo-audit ~/.cargo/bin/
+          rm -rf ~/.cargo/advisory-db/
+          cargo audit --ignore RUSTSEC-2020-0071 # time-rs, but not used by chrono, see https://github.com/chronotope/chrono/issues/602
+
+      - name: Quality - cargo outdated
         timeout-minutes: 20
-        if: ${{ matrix.rust == 'stable' }}
         run: |
           cargo install --locked cargo-outdated || true
-          # cargo install --locked cargo-udeps || true # needs nightly
-          cargo install --locked cargo-audit || true
-          cargo install --locked cargo-pants || true
+          rm -rf ~/.cargo/advisory-db
+          cargo outdated --exit-code 1
 
-      - name: Check
-        if: ${{ matrix.rust == 'stable' }}
+      # - name: Quality - cargo udeps (needs nightly)
+      #   run: |
+      #     cargo install --locked cargo-udeps || true
+      #     cargo udeps
+
+      - name: Quality - cargo pants
         run: |
-          cargo outdated --exit-code 1
-          # cargo udeps
-          rm -rf ~/.cargo/advisory-db
-          cargo audit --ignore RUSTSEC-2020-0071 # time-rs, but not used by chrono, see https://github.com/chronotope/chrono/issues/602
+          cargo install --locked cargo-pants || true
           cargo pants
 
       - name: Build (dev)
diff --git a/.github/workflows/large-scope.yml b/.github/workflows/large-scope.yml
index a5c6027..eace811 100644
--- a/.github/workflows/large-scope.yml
+++ b/.github/workflows/large-scope.yml
@@ -12,22 +12,21 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [1.50.0, beta, nightly]
+        # rust: [1.74.0, beta, nightly]
+        rust: [1.74.0, beta]
 
     steps:
       - name: Rust install
-        uses: actions-rs/toolchain@v1
+        uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
-          profile: minimal
-          override: true
           components: rustfmt, clippy
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cache crates from crates.io
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         continue-on-error: false
         with:
           path: |
@@ -43,22 +42,46 @@ jobs:
           cargo fmt --all -- --check
           cargo clippy -- -D warnings
 
-      # - name: Install cargo check tools
+      # - name: Quality - convco check
+      #   run: |
+      #     git show-ref
+      #     curl -sSfLO https://github.com/convco/convco/releases/latest/download/convco-ubuntu.zip
+      #     unzip convco-ubuntu.zip
+      #     chmod +x convco
+      #     ./convco --version
+      #     ./convco check -c .convco
+      #     rm convco
+
+      # - name: Quality - cargo deny check
+      #   run: |
+      #     curl -sSfL https://github.com/EmbarkStudios/cargo-deny/releases/download/0.12.2/cargo-deny-0.12.2-x86_64-unknown-linux-musl.tar.gz | tar zx --no-anchored cargo-deny --strip-components=1
+      #     chmod +x cargo-deny
+      #     mv cargo-deny ~/.cargo/bin/
+      #     cargo deny check
+
+      # - name: Quality - cargo audit check
+      #   run: |
+      #     curl -sSfL https://github.com/rustsec/rustsec/releases/download/cargo-audit%2Fv0.17.3/cargo-audit-x86_64-unknown-linux-musl-v0.17.3.tgz | tar zx --no-anchored cargo-audit --strip-components=1
+      #     chmod +x cargo-audit
+      #     mv cargo-audit ~/.cargo/bin/
+      #     rm -rf ~/.cargo/advisory-db/
+      #     cargo audit --ignore RUSTSEC-2020-0071 # time-rs, but not used by chrono, see https://github.com/chronotope/chrono/issues/602
+
+      # - name: Quality - cargo outdated
       #   timeout-minutes: 20
-      #   if: ${{ matrix.rust == 'stable' }}
       #   run: |
       #     cargo install --locked cargo-outdated || true
-      #     # cargo install --locked cargo-udeps || true # needs nightly
-      #     cargo install --locked cargo-audit || true
-      #     cargo install --locked cargo-pants || true
+      #     rm -rf ~/.cargo/advisory-db
+      #     cargo outdated --exit-code 1
 
-      # - name: Check
-      #   if: ${{ matrix.rust == 'stable' }}
+      # - name: Quality - cargo udeps (needs nightly)
       #   run: |
-      #     cargo outdated --exit-code 1
-      #     # cargo udeps
-      #     rm -rf ~/.cargo/advisory-db
-      #     cargo audit --ignore RUSTSEC-2020-0071 # time-rs, but not used by chrono, see https://github.com/chronotope/chrono/issues/602
+      #     cargo install --locked cargo-udeps || true
+      #     cargo udeps
+
+      # - name: Quality - cargo pants
+      #   run: |
+      #     cargo install --locked cargo-pants || true
       #     cargo pants
 
       - name: Build (dev)
@@ -76,30 +99,31 @@ jobs:
     strategy:
       matrix:
         include:
-          - os: macos-latest
+          - os: macos-13
             target: x86_64-apple-darwin
             type: unix
+            toolchain: stable
           - os: macos-latest
             target: aarch64-apple-darwin
             type: unix
+            toolchain: stable
           - os: windows-latest
             target: x86_64-pc-windows-msvc
             type: windows
+            toolchain: stable
     steps:
       - name: Rust install
-        uses: actions-rs/toolchain@v1
+        uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: stable
-          profile: minimal
-          override: true
+          toolchain: ${{ matrix.toolchain }}
           target: ${{ matrix.target }}
           components: rustfmt, clippy
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cache crates from crates.io
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         continue-on-error: false
         with:
           path: |
@@ -110,10 +134,13 @@ jobs:
              target/
           key: '${{ runner.os }}-${{ matrix.target }}-cargo-stable-${{ hashFiles(''**/Cargo.lock'') }}'
 
-      - name: Lint
-        run: |
-          cargo fmt --all -- --check
-          cargo clippy -- -D warnings
+      # - name: Quality - cargo fmt
+      #   run: |
+      #     cargo fmt --all -- --check
+
+      # - name: Quality - cargo clippy
+      #   run: |
+      #     cargo clippy -- -D warnings
 
       # - name: Quality - convco check
       #   run: |
@@ -121,9 +148,9 @@ jobs:
       #     curl -sSfLO https://github.com/convco/convco/releases/latest/download/convco-ubuntu.zip
       #     unzip convco-ubuntu.zip
       #     chmod +x convco
-      #     ./convco check
+      #     ./convco --version
+      #     ./convco check -c .convco
       #     rm convco
-      #   shell: bash
 
       # - name: Quality - cargo deny check
       #   run: |
@@ -131,25 +158,31 @@ jobs:
       #     chmod +x cargo-deny
       #     mv cargo-deny ~/.cargo/bin/
       #     cargo deny check
-      #   shell: bash
 
-      - name: Install cargo check tools
-        timeout-minutes: 20
-        run: |
-          cargo install --locked cargo-outdated || true
-          # cargo install --locked cargo-udeps || true # needs nightly
-          cargo install --locked cargo-audit || true
-          cargo install --locked cargo-pants || true
-        shell: bash
+      # - name: Quality - cargo audit check
+      #   run: |
+      #     curl -sSfL https://github.com/rustsec/rustsec/releases/download/cargo-audit%2Fv0.17.3/cargo-audit-x86_64-unknown-linux-musl-v0.17.3.tgz | tar zx --no-anchored cargo-audit --strip-components=1
+      #     chmod +x cargo-audit
+      #     mv cargo-audit ~/.cargo/bin/
+      #     rm -rf ~/.cargo/advisory-db/
+      #     cargo audit --ignore RUSTSEC-2020-0071 # time-rs, but not used by chrono, see https://github.com/chronotope/chrono/issues/602
 
-      - name: Check
-        run: |
-          cargo outdated --exit-code 1
-          # cargo udeps
-          rm -rf ~/.cargo/advisory-db
-          cargo audit --ignore RUSTSEC-2020-0071 # time-rs, but not used by chrono, see https://github.com/chronotope/chrono/issues/602
-          cargo pants
-        shell: bash
+      # - name: Quality - cargo outdated
+      #   timeout-minutes: 20
+      #   run: |
+      #     cargo install --locked cargo-outdated || true
+      #     rm -rf ~/.cargo/advisory-db
+      #     cargo outdated --exit-code 1
+
+      # - name: Quality - cargo udeps (needs nightly)
+      #   run: |
+      #     cargo install --locked cargo-udeps || true
+      #     cargo udeps
+
+      # - name: Quality - cargo pants
+      #   run: |
+      #     cargo install --locked cargo-pants || true
+      #     cargo pants
 
       - name: Build (dev)
         run: cargo build --all-features
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..017be21
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,42 @@
+name: Release
+on:
+  push:
+   tags:
+     - 'v*'
+
+jobs:
+  release:
+    name: Create a GitHub Release
+    # if: github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+        with:
+          # convco needs all history to create the changelog
+          fetch-depth: 0
+
+      - name: Extract version
+        id: extract-version
+        run: |
+          echo "tag-name=${GITHUB_REF#refs/tags/}" >> ${GITHUB_OUTPUT}
+
+      - name: Download convco
+        run: |
+          git show-ref
+          curl -sSfLO https://github.com/convco/convco/releases/latest/download/convco-ubuntu.zip
+          unzip convco-ubuntu.zip
+          chmod +x convco
+
+      - name: Use convco to create the changelog
+        run: |
+          ./convco changelog -c .convco --max-versions 1 --include-hidden-sections > CHANGELOG.md
+          rm convco convco-ubuntu.zip
+
+      - uses: ncipollo/release-action@v1
+        with:
+          artifacts: "*.zip,*.tar.xz"
+          bodyFile: "CHANGELOG.md"
+          token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/README.md b/README.md
index e088d32..d934fbc 100644
--- a/README.md
+++ b/README.md
@@ -2,14 +2,14 @@
 
 [![crate](https://img.shields.io/crates/v/si-scale.svg)](https://crates.io/crates/si-scale)
 [![documentation](https://docs.rs/si-scale/badge.svg)](https://docs.rs/si-scale)
-[![minimum rustc 1.8](https://img.shields.io/badge/rustc-1.50+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)
+[![minimum rustc 1.74](https://img.shields.io/badge/rustc-1.74+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)
 [![build status](https://github.com/graelo/si-scale/actions/workflows/essentials.yml/badge.svg)](https://github.com/graelo/si-scale/actions/workflows/essentials.yml)
 
 <!-- cargo-sync-readme start -->
 
 Format value with units according to SI ([système international d’unités](https://en.wikipedia.org/wiki/International_System_of_Units)).
 
-Version requirement: _rustc 1.50+_
+Version requirement: _rustc 1.74+_
 
 ```toml
 [dependencies]
diff --git a/ci/test_full.sh b/ci/test_full.sh
index 78c4a27..6670c47 100755
--- a/ci/test_full.sh
+++ b/ci/test_full.sh
@@ -3,7 +3,7 @@
 set -e
 
 CRATE=si-scale
-MSRV=1.50
+MSRV=1.74
 
 get_rust_version() {
   local array=($(rustc --version));
@@ -28,7 +28,7 @@ if ! check_version $MSRV ; then
 fi
 
 FEATURES=()
-# check_version 1.27 && FEATURES+=(libm)
+# check_version 1.74 && FEATURES+=(libm)
 echo "Testing supported features: ${FEATURES[*]}"
 
 set -x
diff --git a/deny.toml b/deny.toml
index 1af1c9d..0949f3c 100644
--- a/deny.toml
+++ b/deny.toml
@@ -35,16 +35,6 @@ targets = [
 db-path = "~/.cargo/advisory-db"
 # The url(s) of the advisory databases to use
 db-urls = ["https://github.com/rustsec/advisory-db"]
-# The lint level for security vulnerabilities
-vulnerability = "deny"
-# The lint level for unmaintained crates
-unmaintained = "warn"
-# The lint level for crates that have been yanked from their source registry
-yanked = "warn"
-# The lint level for crates with security notices. Note that as of
-# 2019-12-17 there are no security notice advisories in
-# https://github.com/rustsec/advisory-db
-notice = "warn"
 # A list of advisory IDs to ignore. Note that ignored advisories will still
 # output a note when they are encountered.
 ignore = [
@@ -70,8 +60,6 @@ ignore = [
 # More documentation for the licenses section can be found here:
 # https://embarkstudios.github.io/cargo-deny/checks/licenses/cfg.html
 [licenses]
-# The lint level for crates which do not have a detectable license
-unlicensed = "deny"
 # List of explicitly allowed licenses
 # See https://spdx.org/licenses/ for list of possible licenses
 # [possible values: any SPDX 3.11 short identifier (+ optional exception)].
@@ -80,26 +68,6 @@ allow = [
     "Apache-2.0",
     #"Apache-2.0 WITH LLVM-exception",
 ]
-# List of explicitly disallowed licenses
-# See https://spdx.org/licenses/ for list of possible licenses
-# [possible values: any SPDX 3.11 short identifier (+ optional exception)].
-deny = [
-    #"Nokia",
-]
-# Lint level for licenses considered copyleft
-copyleft = "warn"
-# Blanket approval or denial for OSI-approved or FSF Free/Libre licenses
-# * both - The license will be approved if it is both OSI-approved *AND* FSF
-# * either - The license will be approved if it is either OSI-approved *OR* FSF
-# * osi-only - The license will be approved if is OSI-approved *AND NOT* FSF
-# * fsf-only - The license will be approved if is FSF *AND NOT* OSI-approved
-# * neither - This predicate is ignored and the default lint level is used
-allow-osi-fsf-free = "neither"
-# Lint level used when no other predicates are matched
-# 1. License isn't in the allow or deny lists
-# 2. License isn't copyleft
-# 3. License isn't OSI/FSF, or allow-osi-fsf-free = "neither"
-default = "deny"
 # The confidence threshold for detecting a license from license text.
 # The higher the value, the more closely the license text must be to the
 # canonical license text of a valid SPDX license file.
diff --git a/src/lib.rs b/src/lib.rs
index 002b96f..82963ca 100755
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,7 +3,7 @@
 
 //! Format value with units according to SI ([système international d'unités](https://en.wikipedia.org/wiki/International_System_of_Units)).
 //!
-//! Version requirement: _rustc 1.50+_
+//! Version requirement: _rustc 1.74+_
 //!
 //! ```toml
 //! [dependencies]
@@ -21,11 +21,11 @@
 //!
 //! - this crate yields more terse code at the call sites
 //! - it gives you more control over the output. As shown later in this page,
-//! you can extend it pretty easily to handle throughput, etc. (seriously, see
-//! below)
+//!   you can extend it pretty easily to handle throughput, etc. (seriously, see
+//!   below)
 //! - but it only operates on numbers, so it does not prevent you from using a
-//! function to print meters on a duration value (which human-repr does
-//! brilliantly).
+//!   function to print meters on a duration value (which human-repr does
+//!   brilliantly).
 //!
 //! ## Getting started
 //!
@@ -213,7 +213,7 @@
 //! - the mantissa,
 //! - the SI unit prefix (such as "kilo", "Mega", etc),
 //! - and the base which represents the cases where "1 k" means 1000 (most
-//! common) and the cases where "1 k" means 1024 (for kiB, MiB, etc).
+//!   common) and the cases where "1 k" means 1024 (for kiB, MiB, etc).
 //!
 //! This crate provides 2 APIs: a low-level API, and a high-level API for
 //! convenience.
@@ -221,9 +221,9 @@
 //! For the low-level API, the typical use case is
 //!
 //! - first parse a number into a [`Value`](`crate::value::Value`). For doing
-//! this, you have to specify the base, and maybe some constraint on the SI
-//! scales. See [`Value::new()`](`crate::value::Value::new()`) and
-//! [`Value::new_with()`](`crate::value::Value::new_with()`)
+//!   this, you have to specify the base, and maybe some constraint on the SI
+//!   scales. See [`Value::new()`](`crate::value::Value::new()`) and
+//!   [`Value::new_with()`](`crate::value::Value::new_with()`)
 //!
 //! - then display the `Value` either by yourself formatting the mantissa
 //!   and prefix (implements the `fmt::Display` trait), or using the provided
diff --git a/src/prefix.rs b/src/prefix.rs
index e3aaeb4..deb7f9d 100644
--- a/src/prefix.rs
+++ b/src/prefix.rs
@@ -93,10 +93,10 @@ impl Prefix {
     /// For instance,
     ///
     /// - if self is `-12` ("pico"), then `exponent()` returns `-12` so that
-    /// `Base::B1000.pow(-12)` returns the scaling factor `1e-12`.
+    ///   `Base::B1000.pow(-12)` returns the scaling factor `1e-12`.
     ///
     /// - if self is `3` ("kilo"), then `exponent()` returns `3` so that
-    /// `Base::B1024.pow(3)` returns the scaling factor `1024`.
+    ///   `Base::B1024.pow(3)` returns the scaling factor `1024`.
     pub fn exponent(&self) -> i32 {
         *self as i32
     }