diff --git a/.secretsignore b/.secretsignore
index 3ee961a..f06e33a 100644
--- a/.secretsignore
+++ b/.secretsignore
@@ -1,3 +1,5 @@
 composer.lock
 ci/deploy_to_github.sh
 src/TransipAPI.php
+src/Entity/OpenStackProject.php
+src/Entity/OpenStackUser.php
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0cd3fb..f73b697 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 CHANGELOG
 =========
 
+6.12.0
+-----
+* Added OpenStack resource
+
 6.11.0
 -----
 * Added destination big storage name for backup restore
diff --git a/src/Entity/OpenStackProject.php b/src/Entity/OpenStackProject.php
new file mode 100644
index 0000000..79de39d
--- /dev/null
+++ b/src/Entity/OpenStackProject.php
@@ -0,0 +1,85 @@
+<?php
+
+namespace Transip\Api\Library\Entity;
+
+class OpenStackProject extends AbstractEntity
+{
+    /**
+     * @description Identifier
+     * @example `7a7a3bcb46c6450f95c53edb8dcebc7b`
+     * @type string
+     * @readonly
+     */
+    protected $id;
+
+    /**
+     * @description Name of the project
+     * @example `hosting101-datacenter`
+     * @type string
+     */
+    protected $name;
+
+    /**
+     * @description Describes this project
+     * @example This is an example project
+     * @type string
+     */
+    protected $description;
+
+    /**
+     * @description When an ongoing process blocks the project from being modified, this is set to `true`
+     * @example false
+     * @type boolean
+     * @readonly
+     */
+    protected $isLocked;
+
+    /**
+     * @description Set to `true` when a project has been administratively blocked
+     * @example false
+     * @type boolean
+     * @readonly
+     */
+    protected $isBlocked;
+
+    public function getId(): string
+    {
+        return $this->id;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function getDescription(): string
+    {
+        return $this->description;
+    }
+
+    public function isLocked(): bool
+    {
+        return $this->isLocked;
+    }
+
+    public function isBlocked(): bool
+    {
+        return $this->isBlocked;
+    }
+
+    /**
+     * @param string $name
+     */
+    public function setName(string $name): void
+    {
+        $this->name = $name;
+    }
+
+    /**
+     * @param string $description
+     */
+    public function setDescription(string $description): void
+    {
+        $this->description = $description;
+    }
+}
diff --git a/src/Entity/OpenStackUser.php b/src/Entity/OpenStackUser.php
new file mode 100644
index 0000000..dafc553
--- /dev/null
+++ b/src/Entity/OpenStackUser.php
@@ -0,0 +1,67 @@
+<?php
+
+namespace Transip\Api\Library\Entity;
+
+class OpenStackUser extends AbstractEntity
+{
+    /**
+     * @description Identifier
+     * @example 6322872d9c7e445dbbb49c1f9ca28adc
+     * @readonly
+     * @type string
+     * @var string
+     */
+    protected $id;
+
+    /**
+     * @description Login name
+     * @example `hosting101-support`
+     * @readonly
+     * @type string
+     */
+    protected $username;
+
+    /**
+     * @description Description
+     * @example `Supporter account`
+     * @type string
+     */
+    protected $description;
+
+    /**
+     * @description Email address
+     * @example `support@example.com`
+     * @type string
+     */
+    protected $email;
+
+    public function getId(): string
+    {
+        return $this->id;
+    }
+
+    public function getUsername(): string
+    {
+        return $this->username;
+    }
+
+    public function getDescription(): string
+    {
+        return $this->description;
+    }
+
+    public function getEmail(): string
+    {
+        return $this->email;
+    }
+
+    public function setDescription(string $description): void
+    {
+        $this->description = $description;
+    }
+
+    public function setEmail(string $email): void
+    {
+        $this->email = $email;
+    }
+}
diff --git a/src/Repository/OpenStack/Project/UserRepository.php b/src/Repository/OpenStack/Project/UserRepository.php
new file mode 100644
index 0000000..7cbc36f
--- /dev/null
+++ b/src/Repository/OpenStack/Project/UserRepository.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace Transip\Api\Library\Repository\OpenStack\Project;
+
+use Transip\Api\Library\Entity\OpenStackUser;
+use Transip\Api\Library\Repository\ApiRepository;
+use Transip\Api\Library\Repository\OpenStack\ProjectRepository;
+
+class UserRepository extends ApiRepository
+{
+    public const RESOURCE_NAME = 'users';
+
+    public const RESOURCE_PARAMETER_PLURAL   = 'users';
+
+    protected function getRepositoryResourceNames(): array
+    {
+        return [ProjectRepository::RESOURCE_NAME, self::RESOURCE_NAME];
+    }
+
+    /**
+     * @param string $projectId
+     * @return OpenStackUser[]
+     */
+    public function getByProjectId(string $projectId): array
+    {
+        $users      = [];
+        $response   = $this->httpClient->get($this->getResourceUrl($projectId));
+        $usersArray = $this->getParameterFromResponse($response, self::RESOURCE_PARAMETER_PLURAL);
+
+        foreach ($usersArray as $userArray) {
+            $users[] = new OpenStackUser($userArray);
+        }
+
+        return $users;
+    }
+
+    public function grantUserAccessToProject(string $projectId, string $userId): void
+    {
+        $url        = $this->getResourceUrl($projectId);
+        $parameters = ['userId' => $userId];
+
+        $this->httpClient->post($url, $parameters);
+    }
+
+    public function revokeUserAccessFromProject(string $projectId, string $userId): void
+    {
+        $this->httpClient->delete(
+            $this->getResourceUrl($projectId, $userId)
+        );
+    }
+}
diff --git a/src/Repository/OpenStack/ProjectRepository.php b/src/Repository/OpenStack/ProjectRepository.php
new file mode 100644
index 0000000..d791d21
--- /dev/null
+++ b/src/Repository/OpenStack/ProjectRepository.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace Transip\Api\Library\Repository\OpenStack;
+
+use Transip\Api\Library\Entity\OpenStackProject;
+use Transip\Api\Library\Repository\ApiRepository;
+
+class ProjectRepository extends ApiRepository
+{
+    public const RESOURCE_NAME = 'openstack/projects';
+
+    public const RESOURCE_PARAMETER_SINGUlAR = 'project';
+    public const RESOURCE_PARAMETER_PLURAL   = 'projects';
+
+    protected function getRepositoryResourceNames(): array
+    {
+        return [self::RESOURCE_NAME];
+    }
+
+    /**
+     * @return OpenStackProject[]
+     */
+    public function getAll(): array
+    {
+        $projects      = [];
+        $response      = $this->httpClient->get($this->getResourceUrl());
+        $projectsArray = $this->getParameterFromResponse($response, self::RESOURCE_PARAMETER_PLURAL);
+
+        foreach ($projectsArray as $projectArray) {
+            $projects[] = new OpenStackProject($projectArray);
+        }
+
+        return $projects;
+    }
+
+    public function create(string $name, string $description): void
+    {
+        $parameters = [
+            'name'        => $name,
+            'description' => $description,
+        ];
+
+        $this->httpClient->post(
+            $this->getResourceUrl(),
+            $parameters
+        );
+    }
+
+    public function getByProjectId(string $projectId): OpenStackProject
+    {
+        $response  = $this->httpClient->get($this->getResourceUrl($projectId));
+        $projectArray = $this->getParameterFromResponse($response, self::RESOURCE_PARAMETER_SINGUlAR);
+
+        return new OpenStackProject($projectArray);
+    }
+
+    public function updateProject(OpenStackProject $project): void
+    {
+        $parameters = [
+            'project' => $project,
+        ];
+
+        $this->httpClient->put(
+            $this->getResourceUrl($project->getId()),
+            $parameters
+        );
+    }
+
+    public function handover(string $projectID, string $targetCustomerName): void
+    {
+        $parameters = [
+            'action'             => 'handover',
+            'targetCustomerName' => $targetCustomerName,
+        ];
+
+        $this->httpClient->patch(
+            $this->getResourceUrl($projectID),
+            $parameters
+        );
+    }
+
+    public function cancel(string $projectID): void
+    {
+        $this->httpClient->delete(
+            $this->getResourceUrl($projectID)
+        );
+    }
+}
diff --git a/src/Repository/OpenStack/UserRepository.php b/src/Repository/OpenStack/UserRepository.php
new file mode 100644
index 0000000..dcf89fd
--- /dev/null
+++ b/src/Repository/OpenStack/UserRepository.php
@@ -0,0 +1,92 @@
+<?php
+
+namespace Transip\Api\Library\Repository\OpenStack;
+
+use Transip\Api\Library\Entity\OpenStackUser;
+use Transip\Api\Library\Repository\ApiRepository;
+
+class UserRepository extends ApiRepository
+{
+    public const RESOURCE_NAME = 'openstack/users';
+
+    public const RESOURCE_PARAMETER_SINGUlAR = 'user';
+    public const RESOURCE_PARAMETER_PLURAL   = 'users';
+
+    protected function getRepositoryResourceNames(): array
+    {
+        return [self::RESOURCE_NAME];
+    }
+
+    /**
+     * @return OpenStackUser[]
+     */
+    public function getAll(): array
+    {
+        $users      = [];
+        $response   = $this->httpClient->get($this->getResourceUrl());
+        $usersArray = $this->getParameterFromResponse($response, self::RESOURCE_PARAMETER_PLURAL);
+
+        foreach ($usersArray as $userArray) {
+            $users[] = new OpenStackUser($userArray);
+        }
+
+        return $users;
+    }
+
+    public function getByUserId(string $userId): OpenStackUser
+    {
+        $response  = $this->httpClient->get($this->getResourceUrl($userId));
+        $userArray = $this->getParameterFromResponse($response, self::RESOURCE_PARAMETER_SINGUlAR);
+
+        return new OpenStackUser($userArray);
+    }
+
+    public function create(
+        string $username,
+        string $description,
+        string $email,
+        string $password,
+        string $projectId
+    ): void {
+        $parameters = [
+            'username'    => $username,
+            'description' => $description,
+            'email'       => $email,
+            'password'    => $password,
+            'projectId'   => $projectId,
+        ];
+
+        $this->httpClient->post($this->getResourceUrl(), $parameters);
+    }
+
+    public function delete(string $userId): void
+    {
+        $this->httpClient->delete(
+            $this->getResourceUrl($userId)
+        );
+    }
+
+    public function updatePassword(string $userId, string $password): void
+    {
+        $parameters = [
+            'newPassword' => $password
+        ];
+
+        $this->httpClient->patch(
+            $this->getResourceUrl($userId),
+            $parameters
+        );
+    }
+
+    public function updateUser(OpenStackUser $openStackUser): void
+    {
+        $parameters = [
+            'user' => $openStackUser
+        ];
+
+        $this->httpClient->put(
+            $this->getResourceUrl($openStackUser->getId()),
+            $parameters
+        );
+    }
+}
diff --git a/src/TransipAPI.php b/src/TransipAPI.php
index cb5d078..186d6ee 100644
--- a/src/TransipAPI.php
+++ b/src/TransipAPI.php
@@ -7,6 +7,7 @@
 use Transip\Api\Library\HttpClient\GuzzleClient;
 use Transip\Api\Library\HttpClient\HttpClient;
 use Transip\Api\Library\HttpClient\HttpClientInterface;
+use Transip\Api\Library\Repository\ApiRepository;
 use Transip\Api\Library\Repository\ApiTestRepository;
 use Transip\Api\Library\Repository\AuthRepository;
 use Transip\Api\Library\Repository\AvailabilityZoneRepository;
@@ -31,6 +32,9 @@
 use Transip\Api\Library\Repository\Invoice\ItemRepository as InvoiceItemRepository;
 use Transip\Api\Library\Repository\Invoice\PdfRepository as InvoicePdfRepository;
 use Transip\Api\Library\Repository\MailServiceRepository;
+use Transip\Api\Library\Repository\OpenStack\ProjectRepository as OpenStackProjectRepository;
+use Transip\Api\Library\Repository\OpenStack\UserRepository as OpenStackUserRepository;
+use Transip\Api\Library\Repository\OpenStack\Project\UserRepository as OpenStackProjectUserRepository;
 use Transip\Api\Library\Repository\PrivateNetworkRepository;
 use Transip\Api\Library\Repository\ProductRepository;
 use Transip\Api\Library\Repository\Product\ElementRepository as ProductElementRepository;
@@ -60,7 +64,7 @@
 class TransipAPI
 {
     public const TRANSIP_API_ENDPOINT = "https://api.transip.nl/v6";
-    public const TRANSIP_API_LIBRARY_VERSION = "6.11.0";
+    public const TRANSIP_API_LIBRARY_VERSION = "6.12.0";
     public const TRANSIP_API_DEMO_TOKEN = "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImp0aSI6ImN3MiFSbDU2eDNoUnkjelM4YmdOIn0.eyJpc3MiOiJhcGkudHJhbnNpcC5ubCIsImF1ZCI6ImFwaS50cmFuc2lwLm5sIiwianRpIjoiY3cyIVJsNTZ4M2hSeSN6UzhiZ04iLCJpYXQiOjE1ODIyMDE1NTAsIm5iZiI6MTU4MjIwMTU1MCwiZXhwIjoyMTE4NzQ1NTUwLCJjaWQiOiI2MDQ0OSIsInJvIjpmYWxzZSwiZ2siOmZhbHNlLCJrdiI6dHJ1ZX0.fYBWV4O5WPXxGuWG-vcrFWqmRHBm9yp0PHiYh_oAWxWxCaZX2Rf6WJfc13AxEeZ67-lY0TA2kSaOCp0PggBb_MGj73t4cH8gdwDJzANVxkiPL1Saqiw2NgZ3IHASJnisUWNnZp8HnrhLLe5ficvb1D9WOUOItmFC2ZgfGObNhlL2y-AMNLT4X7oNgrNTGm-mespo0jD_qH9dK5_evSzS3K8o03gu6p19jxfsnIh8TIVRvNdluYC2wo4qDl5EW5BEZ8OSuJ121ncOT1oRpzXB0cVZ9e5_UVAEr9X3f26_Eomg52-PjrgcRJ_jPIUYbrlo06KjjX2h0fzMr21ZE023Gw";
 
     /**
@@ -353,6 +357,21 @@ public function colocationRemoteHands(): ColoRemoteHandsRepository
         return new ColoRemoteHandsRepository($this->httpClient);
     }
 
+    public function openStackProjects(): OpenStackProjectRepository
+    {
+        return new OpenStackProjectRepository($this->httpClient);
+    }
+
+    public function openStackProjectUsers(): OpenStackProjectUserRepository
+    {
+        return new OpenStackProjectUserRepository($this->httpClient);
+    }
+
+    public function openStackUsers(): OpenStackUserRepository
+    {
+        return new OpenStackUserRepository($this->httpClient);
+    }
+
     public function test(): ApiTestRepository
     {
         return new ApiTestRepository($this->httpClient);