diff --git a/Cargo.lock b/Cargo.lock
index f1662e7..91ea3c0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -32,6 +32,56 @@ version = "0.2.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"
 
+[[package]]
+name = "anstream"
+version = "0.6.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8acc5369981196006228e28809f761875c0327210a891e941f4c683b3a99529b"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55cc3b69f167a1ef2e161439aa98aed94e6028e5f9a59be9a6ffb47aef1651f9"
+
+[[package]]
+name = "anstyle-parse"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b2d16507662817a6a20a9ea92df6652ee4f94f914589377d69f3b21bc5798a9"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79947af37f4177cfead1110013d678905c37501914fba0efea834c3fe9a8d60c"
+dependencies = [
+ "windows-sys 0.59.0",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca3534e77181a9cc07539ad51f2141fe32f6c3ffd4df76db8ad92346b003ae4e"
+dependencies = [
+ "anstyle",
+ "once_cell",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "arc-swap"
 version = "1.7.1"
@@ -155,6 +205,7 @@ version = "0.1.0"
 dependencies = [
  "axum",
  "axum-server",
+ "clap",
  "hashbrown",
  "itertools 0.14.0",
  "rand",
@@ -249,6 +300,46 @@ dependencies = [
  "libloading",
 ]
 
+[[package]]
+name = "clap"
+version = "4.5.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eccb054f56cbd38340b380d4a8e69ef1f02f1af43db2f0cc817a4774d80ae071"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.5.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "efd9466fac8543255d3b1fcad4762c5e116ffe808c8a3043d4263cd4fd4862a2"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.5.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09176aae279615badda0765c0c0b3f6ed53f4709118af73cf4655d85d1530cd7"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f46ad14479a25103f283c0f10005961cf086d8dc42205bb44c46ac563475dca6"
+
 [[package]]
 name = "cmake"
 version = "0.1.54"
@@ -258,6 +349,12 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "colorchoice"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b63caa9aa9397e2d9480a9b13673856c78d8ac123288526c37d7839f2a86990"
+
 [[package]]
 name = "dunce"
 version = "1.0.5"
@@ -283,7 +380,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "976dd42dc7e85965fe702eb8164f21f450704bdde31faefd6471dba214cb594e"
 dependencies = [
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -427,6 +524,12 @@ dependencies = [
  "foldhash",
 ]
 
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
 [[package]]
 name = "home"
 version = "0.5.11"
@@ -528,6 +631,12 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "is_terminal_polyfill"
+version = "1.70.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
+
 [[package]]
 name = "itertools"
 version = "0.12.1"
@@ -826,7 +935,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -967,6 +1076,12 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
 [[package]]
 name = "subtle"
 version = "2.6.1"
@@ -1100,6 +1215,12 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
 
+[[package]]
+name = "utf8parse"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
+
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
diff --git a/Cargo.toml b/Cargo.toml
index 99ff62e..d986361 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2024"
 [dependencies]
 axum = "0.8.3"
 axum-server = { version = "0.7.2", features = ["tls-rustls"] }
+clap = { version = "4.5.37", features = ["derive"] }
 hashbrown = "0.15.2"
 itertools = "0.14.0"
 rand = "0.9.1"
diff --git a/src/main.rs b/src/main.rs
index a1c232b..50c1a8d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,10 +1,12 @@
 use axum::{Router, extract::Path, response::Html, routing::get};
 use axum_server::{bind_rustls, tls_rustls::RustlsConfig};
+use clap::Parser;
 use hashbrown::HashMap;
 use itertools::Itertools;
 use rand::{prelude::*, random_range};
 use rand_chacha::{ChaCha8Rng, rand_core::SeedableRng};
 use std::{
+    net::SocketAddr,
     path::PathBuf,
     sync::{
         Arc,
@@ -13,6 +15,14 @@ use std::{
     time::Duration,
 };
 
+#[derive(Parser)]
+pub struct Args {
+    #[arg(long)]
+    port: u16,
+    #[arg(long)]
+    pem_dir: PathBuf,
+}
+
 #[tokio::main]
 async fn main() {
     println!("Starting...");
@@ -121,9 +131,11 @@ async fn main() {
         }
     });
 
+    let args = Args::parse();
+
     let config = RustlsConfig::from_pem_file(
-        PathBuf::from(std::env::var("PEM_DIR").expect("PEM_DIR not set")).join("cert.pem"),
-        PathBuf::from(std::env::var("PEM_DIR").expect("PEM_DIR not set")).join("key.pem"),
+        args.pem_dir.clone().join("cert.pem"),
+        args.pem_dir.clone().join("key.pem"),
     )
     .await
     .unwrap();