diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 664a1829..a3271e84 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,7 @@ jobs:
   minimum-version-check:
     strategy:
       matrix:
-        rust_toolchain: [1.57.0]
+        rust_toolchain: [1.60.0]
         os: [ubuntu-latest, macOS-latest, windows-latest]
     name: minimum version check using Rust ${{ matrix.rust_toolchain }} on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
diff --git a/Cargo.toml b/Cargo.toml
index 698cef2b..2aee7b20 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ base16 = { version = "0.2.1", default-features = false }
 # base64 = { version = "0.21.0", default-features = false }
 data-encoding = { version = "2.3.3", default-features = false }
 chrono = { version = "0.4.19", optional = true }
-clap = { version = "3.1.6", optional = true, features = ["derive"] }
+clap = { version = "4.0.8", optional = true, features = ["derive"] }
 codespan-reporting = "0.11.1"
 hexf-parse = "0.2.1"
 itertools = "0.10.1"
diff --git a/Dockerfile b/Dockerfile
index 5659b3a5..c8ec3ee3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,10 @@
-FROM ekidd/rust-musl-builder:1.57.0 AS builder
+FROM rust:1.64.0-alpine AS builder
+RUN apk update
+RUN apk add --no-cache openssl-dev musl-dev
+WORKDIR /usr/src/cddl
 COPY . ./
 RUN cargo b --release --bin cddl
 
-FROM scratch
-COPY --from=builder /home/rust/src/target/x86_64-unknown-linux-musl/release/cddl /cddl
-ENTRYPOINT [ "/cddl" ]
\ No newline at end of file
+FROM alpine:latest
+COPY --from=builder /usr/src/cddl/target/release/cddl /usr/local/bin/cddl
+ENTRYPOINT [ "/usr/local/bin/cddl" ]
\ No newline at end of file
diff --git a/README.md b/README.md
index 1af1e1ee..adb94870 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ A Rust implementation of the Concise data definition language (CDDL). CDDL is an
 
 This crate includes a handwritten parser and lexer for CDDL, and its development has been heavily inspired by the techniques outlined in Thorsten Ball's book ["Writing An Interpretor In Go"](https://interpreterbook.com/). The AST has been built to closely match the rules defined by the ABNF grammar in [Appendix B.](https://tools.ietf.org/html/rfc8610#appendix-B) of the spec. All CDDL must use UTF-8 for its encoding per the spec.
 
-This crate supports validation of both CBOR and JSON data structures. The minimum supported Rust version (MSRV) is 1.57.0.
+This crate supports validation of both CBOR and JSON data structures. The minimum supported Rust version (MSRV) is 1.60.0.
 
 Also bundled into this repository is a basic language server implementation and extension for Visual Studio Code for editing CDDL. The implementation is backed by the compiled WebAssembly target included in this crate.
 
diff --git a/src/bin/cli.rs b/src/bin/cli.rs
index b9e21e12..17267650 100644
--- a/src/bin/cli.rs
+++ b/src/bin/cli.rs
@@ -63,15 +63,13 @@ struct Validate {
     short = 'j',
     long = "json",
     help = "JSON document(s) to validate",
-    use_value_delimiter = true,
-    multiple_values = true
+    use_value_delimiter = true
   )]
   json: Option<Vec<String>>,
   #[clap(
     short = 'c',
     long = "cbor",
     help = "CBOR binary file(s) to validate",
-    multiple_values = true,
     use_value_delimiter = true
   )]
   cbor: Option<Vec<String>>,
diff --git a/src/lib.rs b/src/lib.rs
index 940a718a..ff16522d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -30,7 +30,7 @@
 //!
 //! This crate supports validation of both CBOR and JSON data structures. An
 //! extremely basic REPL is included as well. This crate's minimum supported
-//! Rust version (MSRV) is 1.57.0.
+//! Rust version (MSRV) is 1.60.0.
 //!
 //! Also bundled into this repository is a basic language server implementation
 //! and extension for Visual Studio Code for editing CDDL. The implementation is