diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2d9a141..bb951c9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,6 +33,7 @@ jobs:
         include:
           - { target: x86_64-unknown-linux-musl }
           - { target: x86_64-unknown-linux-musl, rust: nightly }
+          - { target: x86_64-unknown-linux-musl, rust: '1.64' }  # MSRV
           - { target: x86_64-unknown-linux-gnu }
           - { target: x86_64-apple-darwin, os: macos-latest }
           - { target: aarch64-unknown-linux-musl }
diff --git a/README.adoc b/README.adoc
index 73386d8..32af52c 100644
--- a/README.adoc
+++ b/README.adoc
@@ -3,9 +3,11 @@
 :gh-name: jirutka/{proj-name}
 :version: 0.1.0-pre.2
 :releases-uri: https://github.com/{gh-name}/releases/download/v{version}
+:msrv: 1.64
 
 ifdef::env-github[]
 image:https://img.shields.io/crates/v/{proj-name}.svg[Version on crates.io, link=https://crates.io/crates/{proj-name}]
+image:https://img.shields.io/badge/MSRV-{msrv}-informational[Minimal supported Rust version]
 image:https://docs.rs/{proj-name}/badge.svg[docs.rs, link=https://docs.rs/crate/{proj-name}/]
 image:https://github.com/{gh-name}/workflows/CI/badge.svg[CI Workflow, link=https://github.com/{gh-name}/actions?query=workflow%3A%22CI%22]
 endif::env-github[]
diff --git a/alpkit/Cargo.toml b/alpkit/Cargo.toml
index a668b9a..6a6dd86 100644
--- a/alpkit/Cargo.toml
+++ b/alpkit/Cargo.toml
@@ -2,12 +2,14 @@
 name = "alpkit"
 version = "0.1.0-pre.2"
 authors = ["Jakub Jirutka <jakub@jirutka.cz>"]
-edition = "2021"
 description = "A library for reading metadata from the APKv2 package format and APKBUILD."
 repository = "https://github.com/jirutka/alpkit"
 license = "MIT"
 keywords = ["alpine", "alpine-linux", "apk", "apk-tools"]
 
+edition = "2021"
+rust-version = "1.64"
+
 [features]
 default = ["flate2-rust"]
 # Encode/decode `xattrs` in JSON with base64. If disabled, `xattr` values will
diff --git a/apk-inspect/Cargo.toml b/apk-inspect/Cargo.toml
index 197d4c4..45f681b 100644
--- a/apk-inspect/Cargo.toml
+++ b/apk-inspect/Cargo.toml
@@ -2,12 +2,14 @@
 name = "apk-inspect"
 version = "0.1.0-pre.2"
 authors = ["Jakub Jirutka <jakub@jirutka.cz>"]
-edition = "2021"
 description = "A CLI tool for reading metadata from the APKv2 package format and APKBUILD."
 repository = "https://github.com/jirutka/alpkit"
 license = "MIT"
 keywords = ["cli", "alpine", "alpine-linux", "apk", "apk-tools"]
 
+edition = "2021"
+rust-version = "1.64"
+
 [features]
 default = ["flate2-rust"]
 # Choose the flate2 backend. Note that flate2-rust and flate2-zlib