diff --git a/src/util.rs b/src/util.rs
index 84da037..3801e89 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -141,7 +141,7 @@ pub fn get_user_agent() -> String {
 
 pub fn get_os() -> String {
     if cfg!(target_os = "macos") {
-        "MacOS"
+        "macOS"
     } else if cfg!(target_os = "ios") {
         "iOS"
     } else if cfg!(target_os = "android") {