diff --git a/adbyss/Cargo.toml b/adbyss/Cargo.toml
index 9d0e994..5682346 100644
--- a/adbyss/Cargo.toml
+++ b/adbyss/Cargo.toml
@@ -90,7 +90,7 @@ items = [
 ]
 
 [dependencies]
-argyle = "0.7.*"
+argyle = "0.7.2"
 dactyl = "0.7.*"
 fyi_msg = "0.13.*"
 libc = "0.2.*"
diff --git a/adbyss/src/main.rs b/adbyss/src/main.rs
index 381be8e..682a23d 100644
--- a/adbyss/src/main.rs
+++ b/adbyss/src/main.rs
@@ -77,6 +77,23 @@ fn _main() -> Result<(), AdbyssError> {
 	// Parse CLI arguments.
 	let args = Argue::new(FLAG_VERSION | FLAG_HELP)?;
 
+	// Check for invalid CLI options.
+	if let Some(boo) = args.check_keys(
+		&[
+			b"--disable",
+			b"--quiet",
+			b"--show",
+			b"--stdout",
+			b"--systemd",
+			b"--yes",
+			b"-q",
+			b"-y",
+		],
+		&[b"--config", b"-c"],
+	) {
+		return Err(AdbyssError::InvalidCli(String::from_utf8_lossy(boo).into()));
+	}
+
 	// Load configuration. If the user specified one, go with that and print an
 	// error if the path is invalid. Otherwise look for a config at the default
 	// path and go with that if it exists. Otherwise just use the internal
diff --git a/adbyss_core/src/error.rs b/adbyss_core/src/error.rs
index e31123a..3a5aa1b 100644
--- a/adbyss_core/src/error.rs
+++ b/adbyss_core/src/error.rs
@@ -30,6 +30,8 @@ pub enum AdbyssError {
 	HostsRead(Box<Path>),
 	/// # Write error.
 	HostsWrite(Box<Path>),
+	/// # Uknown CLI option.
+	InvalidCli(Box<str>),
 	/// # No Internet.
 	NoInternet,
 	/// # Root required.
@@ -50,6 +52,7 @@ impl fmt::Display for AdbyssError {
 			Self::HostsInvalid(path) => f.write_fmt(format_args!("Invalid hostfile: {path:?}")),
 			Self::HostsRead(path) => f.write_fmt(format_args!("Unable to read hostfile: {path:?}")),
 			Self::HostsWrite(path) => f.write_fmt(format_args!("Unable to write hostfile: {path:?}")),
+			Self::InvalidCli(s) => f.write_fmt(format_args!("Invalid/unknown option: {s}")),
 			Self::NoInternet => f.write_str("No internet connection was available."),
 			Self::Root => f.write_str("Adbyss requires root privileges."),
 			Self::SourceFetch(src) => f.write_fmt(format_args!("Unable to fetch source: {}", src.as_str())),