diff --git a/changelog.txt b/changelog.txt
index 72751bd82..5a8859a78 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,7 +1,7 @@
 Version 4.5.1
 ===============
 - **ADAL 4.5.0 and lower fails to install due to a version conflict on Android projects targeting Xamarin.Android.Support libraries version 28.x**. The ADAL Xamarin.Android.Support libraries have been updated to 27.0.2.1, the maximum version on Android8.1. [ADAL issue #1486](https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/issues/1486)
-- **ADAL occassionally threw a NullReferenceException during Http calls when there were network timeouts**. Now a relevant timeout AdalServiceException will be thrown. [ADAL issue #1489](https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/issues/1489)
+- **ADAL occasionally threw a NullReferenceException during Http calls when there were network timeouts**. Now a relevant timeout AdalServiceException will be thrown. [ADAL issue #1489](https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/issues/1489)
 
 Version 4.5.0
 ===============