diff --git a/src/utils/parceyaml.rs b/src/utils/parceyaml.rs
index fb55ebe..5e29f1a 100644
--- a/src/utils/parceyaml.rs
+++ b/src/utils/parceyaml.rs
@@ -157,7 +157,7 @@ async fn populate_headers_and_auth(config: &mut Configuration, parsed: &Config)
     let mut ch: Vec<(String, Arc<str>)> = Vec::new();
     if let Some(headers) = &parsed.client_headers {
         for header in headers {
-            if let Some((key, val)) = header.rsplit_once(':') {
+            if let Some((key, val)) = header.split_once(':') {
                 ch.push((key.to_string(), Arc::from(val)));
             }
         }
@@ -170,7 +170,7 @@ async fn populate_headers_and_auth(config: &mut Configuration, parsed: &Config)
     let mut sh: Vec<(String, Arc<str>)> = Vec::new();
     if let Some(headers) = &parsed.server_headers {
         for header in headers {
-            if let Some((key, val)) = header.rsplit_once(':') {
+            if let Some((key, val)) = header.split_once(':') {
                 sh.push((key.to_string(), Arc::from(val.trim())));
             }
         }
@@ -321,7 +321,7 @@ fn parce_tls_grades(what: Option<String>) -> Option<String> {
 pub fn build_headers(path_config: &Option<Vec<String>>, _config: &Configuration, hl: &mut Vec<(String, Arc<str>)>) {
     if let Some(headers) = &path_config {
         for header in headers {
-            if let Some((key, val)) = header.rsplit_once(':') {
+            if let Some((key, val)) = header.split_once(':') {
                 hl.push((key.trim().to_string(), Arc::from(val.trim())));
             }
         }