diff --git a/src/crawl.rs b/src/crawl.rs
index c0753b6..52a4b95 100644
--- a/src/crawl.rs
+++ b/src/crawl.rs
@@ -1,6 +1,6 @@
 use crate::federated_instances::GetSiteResponse;
 use crate::node_info::NodeInfo;
-use crate::{EXCLUDE_INSTANCES, REQUEST_TIMEOUT};
+use crate::REQUEST_TIMEOUT;
 use anyhow::anyhow;
 use anyhow::Error;
 use futures::try_join;
@@ -10,6 +10,7 @@ use std::collections::VecDeque;
 
 pub async fn crawl(
     start_instances: Vec<String>,
+    exclude: Vec<String>,
     max_depth: i32,
 ) -> Result<(Vec<InstanceDetails>, i32), Error> {
     let mut pending_instances: VecDeque<CrawlInstance> = start_instances
@@ -21,9 +22,7 @@ pub async fn crawl(
     let mut failed_instances = 0;
     while let Some(current_instance) = pending_instances.pop_back() {
         crawled_instances.push(current_instance.domain.clone());
-        if current_instance.depth > max_depth
-            || EXCLUDE_INSTANCES.contains(&&**&current_instance.domain)
-        {
+        if current_instance.depth > max_depth || exclude.contains(&current_instance.domain) {
             continue;
         }
         match fetch_instance_details(&current_instance.domain).await {
@@ -48,7 +47,7 @@ pub async fn crawl(
     // Sort by active monthly users descending
     instance_details.sort_by_key(|i| i.users_active_month);
     instance_details.reverse();
-    
+
     Ok((instance_details, failed_instances))
 }
 
diff --git a/src/lib.rs b/src/lib.rs
index ac7af40..358a10e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,9 +7,5 @@ pub mod node_info;
 pub const REQUEST_TIMEOUT: Duration = Duration::from_secs(10);
 pub const DEFAULT_START_INSTANCES: &str = "lemmy.ml";
 pub const DEFAULT_MAX_CRAWL_DEPTH: &str = "1";
-pub const EXCLUDE_INSTANCES: &'static [&str] = &[
-    "ds9.lemmy.ml",
-    "enterprise.lemmy.ml",
-    "voyager.lemmy.ml",
-    "test.lemmy.ml",
-];
+pub const EXCLUDE_INSTANCES: &str =
+    "ds9.lemmy.ml, enterprise.lemmy.ml, voyager.lemmy.ml, test.lemmy.ml";
diff --git a/src/main.rs b/src/main.rs
index 7bd0f93..6a039dd 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,7 @@
 use anyhow::Error;
 use clap::{App, Arg};
 use lemmy_stats_crawler::crawl::{crawl, InstanceDetails};
-use lemmy_stats_crawler::{DEFAULT_MAX_CRAWL_DEPTH, DEFAULT_START_INSTANCES};
+use lemmy_stats_crawler::{DEFAULT_MAX_CRAWL_DEPTH, DEFAULT_START_INSTANCES, EXCLUDE_INSTANCES};
 use serde::Serialize;
 
 #[tokio::main]
@@ -12,6 +12,7 @@ pub async fn main() -> Result<(), Error> {
                 .long("start-instances")
                 .takes_value(true),
         )
+        .arg(Arg::with_name("exclude").long("exclude").takes_value(true))
         .arg(
             Arg::with_name("max-crawl-depth")
                 .long("max-crawl-depth")
@@ -22,7 +23,13 @@ pub async fn main() -> Result<(), Error> {
         .value_of("start-instances")
         .unwrap_or(DEFAULT_START_INSTANCES)
         .split(',')
-        .map(|s| s.to_string())
+        .map(|s| s.trim().to_string())
+        .collect();
+    let exclude: Vec<String> = matches
+        .value_of("exclude")
+        .unwrap_or(EXCLUDE_INSTANCES)
+        .split(',')
+        .map(|s| s.trim().to_string())
         .collect();
     let max_crawl_depth: i32 = matches
         .value_of("max-crawl-depth")
@@ -30,7 +37,8 @@ pub async fn main() -> Result<(), Error> {
         .parse()?;
 
     eprintln!("Crawling...");
-    let (instance_details, failed_instances) = crawl(start_instances, max_crawl_depth).await?;
+    let (instance_details, failed_instances) =
+        crawl(start_instances, exclude, max_crawl_depth).await?;
     let total_stats = aggregate(instance_details, failed_instances);
 
     println!("{}", serde_json::to_string_pretty(&total_stats)?);