diff --git a/src/cert_store.rs b/src/cert_store.rs
index e2ad62b..bc05d1b 100644
--- a/src/cert_store.rs
+++ b/src/cert_store.rs
@@ -48,7 +48,11 @@ impl CertStore {
 			let proxy_config: Arc<ProxyConfig> = rx_proxy_config.borrow().clone();
 			for ent in proxy_config.entries.iter() {
 				if let HostDescription::Hostname(domain) = &ent.host {
-					domains.insert(domain.clone());
+					if let Some((host, _port)) = domain.split_once(':') {
+						domains.insert(host.to_string());
+					} else {
+						domains.insert(domain.clone());
+					}
 				}
 			}