diff --git a/README.md b/README.md
index 844c392..e9f9e50 100644
--- a/README.md
+++ b/README.md
@@ -117,7 +117,7 @@ To opt-in/opt-out:
 }
 ```
 
-To opt-in/opt-out specific device-related parameters, you can use the `OptInParams()` or `OptOutParams()`.  `OptInParams()` will only send device-related parameters that are specified.  `OptOutParams()` will send all device-related parameters except ones that are specified.  Please note that we require at least `ip_address`, `advertising_id`, `developer_device_id`, `limit_ad_tracking`, `referrer` (Android), and `iad` (iOS) to properly track devices in Tenjin's system.
+To opt-in/opt-out specific device-related parameters, you can use the `OptInParams()` or `OptOutParams()`.  `OptInParams()` will only send device-related parameters that are specified.  `OptOutParams()` will send all device-related parameters except ones that are specified.  **Please note that we require at least `ip_address`, `advertising_id`, `developer_device_id`, `limit_ad_tracking`, `referrer` (Android), and `iad` (iOS) to properly track devices in Tenjin's system.**
 
 If you want to only get specific device-related parameters, use `OptInParams()`. In example below, we will only these device-related parameters: `ip_address`, `advertising_id`, `developer_device_id`, `limit_ad_tracking`, `referrer`, and `iad`:
 
@@ -149,7 +149,7 @@ NSArray *optOutParams = @[@"country", @"timezone", @"language"];
 | limit_ad_tracking  | limit ad tracking enabled | [iOS](https://developer.apple.com/documentation/adsupport/asidentifiermanager/1614148-isadvertisingtrackingenabled) |
 | platform | platform  | iOS |
 | iad | Apple Search Ad parameters | [iOS](https://searchads.apple.com/advanced/help/measure-results/#attribution-api) |
-| os_version | Operating system version | [iOS](https://developer.apple.com/documentation/uikit/uidevice/1620043-systemversion) |
+| os_version | operating system version | [iOS](https://developer.apple.com/documentation/uikit/uidevice/1620043-systemversion) |
 | device | device name | [iOS (hw.machine)](https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man3/sysctl.3.html) |
 | device_model | device model | [iOS (hw.model)](https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man3/sysctl.3.html) |
 | device_model_name | device machine  | [iOS (hw.model)](https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man3/sysctl.3.html) |