diff --git a/compiler/cl-repl/Cargo.toml b/compiler/cl-repl/Cargo.toml
index 7c92001..3807e5d 100644
--- a/compiler/cl-repl/Cargo.toml
+++ b/compiler/cl-repl/Cargo.toml
@@ -16,4 +16,4 @@ cl-token = { path = "../cl-token" }
 cl-parser = { path = "../cl-parser" }
 cl-interpret = { path = "../cl-interpret" }
 repline = { path = "../../repline" }
-argh = "0.1.12"
+argwerk = "0.20.4"
diff --git a/compiler/cl-repl/src/args.rs b/compiler/cl-repl/src/args.rs
index 40265ba..1ef4921 100644
--- a/compiler/cl-repl/src/args.rs
+++ b/compiler/cl-repl/src/args.rs
@@ -1,26 +1,40 @@
 //! Handles argument parsing (currently using the [argh] crate)
 
-use argh::FromArgs;
 use std::{io::IsTerminal, path::PathBuf, str::FromStr};
 
-/// The Conlang prototype debug interface
-#[derive(Clone, Debug, FromArgs, PartialEq, Eq, PartialOrd, Ord)]
-pub struct Args {
-    /// the main source file
-    #[argh(positional)]
-    pub file: Option<PathBuf>,
+argwerk::define! {
+    ///
+    ///The Conlang prototype debug interface
+    #[usage = "conlang [<file>] [-I <include...>] [-m <mode>] [-r <repl>]"]
+    #[derive(Clone, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct Args {
+        pub file: Option<PathBuf>,
+        pub include: Vec<PathBuf>,
+        pub mode: Mode,
+        pub repl: bool = is_terminal(),
+    }
 
-    /// files to include
-    #[argh(option, short = 'I')]
-    pub include: Vec<PathBuf>,
-
-    /// the CLI operating mode (`f`mt | `l`ex | `r`un)
-    #[argh(option, short = 'm', default = "Default::default()")]
-    pub mode: Mode,
-
-    /// whether to start the repl (`true` or `false`)
-    #[argh(option, short = 'r', default = "is_terminal()")]
-    pub repl: bool,
+    ///files to include
+    ["-I" | "--include", path] => {
+        include.push(path.into());
+    }
+    ///the CLI operating mode (`f`mt | `l`ex | `r`un)
+    ["-m" | "--mode", flr] => {
+        mode = flr.parse()?;
+    }
+    ///whether to start the repl (`true` or `false`)
+    ["-r" | "--repl", bool] => {
+        repl = bool.parse()?;
+    }
+    ///display usage information
+    ["-h" | "--help"] => {
+        println!("{}", Args::help());
+        if true { std::process::exit(0); }
+    }
+    ///the main source file
+    [#[option] path] if file.is_none() => {
+        file = path.map(Into::into);
+    }
 }
 
 /// gets whether stdin AND stdout are a terminal, for pipelining
diff --git a/compiler/cl-repl/src/bin/conlang.rs b/compiler/cl-repl/src/bin/conlang.rs
index 06ea88a..4ed9f3c 100644
--- a/compiler/cl-repl/src/bin/conlang.rs
+++ b/compiler/cl-repl/src/bin/conlang.rs
@@ -1,5 +1,5 @@
-use cl_repl::cli::run;
+use cl_repl::{args, cli::run};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    run(argh::from_env())
+    run(args::Args::args()?)
 }