diff --git a/src/bin/swayr.rs b/src/bin/swayr.rs
index 8bad2f7..ae5aa85 100644
--- a/src/bin/swayr.rs
+++ b/src/bin/swayr.rs
@@ -1,5 +1,29 @@
+extern crate clap;
+use clap::Clap;
 use swayr::client;
 
+/// Windows are sorted so that urgent windows come first, then windows in
+/// last-recently-used order, and the focused window last.
+#[derive(Clap)]
+#[clap(
+    name = "swayr -- a window switcher for sway",
+    version = option_env!("CARGO_PKG_VERSION").unwrap_or("<unknown version>"),
+    author = "Tassilo Horn <tsdh@gnu.org>"
+)]
+struct Opts {
+    #[clap(subcommand)]
+    command: SwayrCommand,
+}
+
+#[derive(Clap)]
+enum SwayrCommand {
+    /// Switch window using wofi (urgent first, then LRU order, focused last)
+    SwitchWindow,
+}
+
 fn main() {
-    client::switch_window();
+    let opts: Opts = Opts::parse();
+    match opts.command {
+        SwayrCommand::SwitchWindow => client::switch_window(),
+    }
 }
diff --git a/src/util.rs b/src/util.rs
index 7d7867d..433480b 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -52,6 +52,7 @@ where
         .arg("--allow-markup")
         .arg("--allow-images")
         .arg("--insensitive")
+        .arg("--cache-file=/dev/null")
         .arg("--prompt")
         .arg(prompt)
         .stdin(proc::Stdio::piped())