diff --git a/README.md b/README.md
index c858c202..d80594d0 100644
--- a/README.md
+++ b/README.md
@@ -220,8 +220,8 @@ play {
 }
 ```
 
-> Note: Currently [Service Account impersonation](https://cloud.google.com/docs/authentication/use-service-account-impersonation)
-is only supported when using [Application Default Credentials](https://cloud.google.com/docs/authentication/provide-credentials-adc)
+> Note: Currently, [Service Account impersonation](https://cloud.google.com/docs/authentication/use-service-account-impersonation)
+is only supported when using [Application Default Credentials](https://cloud.google.com/docs/authentication/provide-credentials-adc).
 
 ## Task organization
 
diff --git a/play/plugin/src/main/kotlin/com/github/triplet/gradle/play/PlayPublisherExtension.kt b/play/plugin/src/main/kotlin/com/github/triplet/gradle/play/PlayPublisherExtension.kt
index 09c9da14..26bb398f 100644
--- a/play/plugin/src/main/kotlin/com/github/triplet/gradle/play/PlayPublisherExtension.kt
+++ b/play/plugin/src/main/kotlin/com/github/triplet/gradle/play/PlayPublisherExtension.kt
@@ -50,7 +50,7 @@ abstract class PlayPublisherExtension @Inject constructor(
     abstract val useApplicationDefaultCredentials: Property<Boolean>
 
     /**
-     * Specify the Service Account to impersonate
+     * Specify the Service Account to impersonate.
      */
     @get:Optional
     @get:Input
diff --git a/play/plugin/src/main/kotlin/com/github/triplet/gradle/play/tasks/internal/PlayApiService.kt b/play/plugin/src/main/kotlin/com/github/triplet/gradle/play/tasks/internal/PlayApiService.kt
index 2450ab0f..c50fac3c 100644
--- a/play/plugin/src/main/kotlin/com/github/triplet/gradle/play/tasks/internal/PlayApiService.kt
+++ b/play/plugin/src/main/kotlin/com/github/triplet/gradle/play/tasks/internal/PlayApiService.kt
@@ -46,7 +46,7 @@ internal abstract class PlayApiService @Inject constructor(
         }
 
         if (useAppDefaultCreds) {
-            PlayPublisher(parameters.appId.get(), parameters.impersonateServiceAccount.getOrNull())
+            PlayPublisher(parameters.appId.get(), parameters.impersonateServiceAccount.orNull)
         } else {
             credentialStream().use {
                 PlayPublisher(it, parameters.appId.get())