diff --git a/container_registry.go b/container_registry.go
index 00d7ba8..95c592d 100644
--- a/container_registry.go
+++ b/container_registry.go
@@ -133,8 +133,8 @@ type ContainerRegistryRepoUpdateReq struct {
 
 // DockerCredentialsOpt contains the options used to create Docker credentials
 type DockerCredentialsOpt struct {
-	ExpirySeconds *int
-	WriteAccess   *bool
+	ExpirySeconds int
+	WriteAccess   bool
 }
 
 // ContainerRegistryDockerCredentials represents the byte array of character