diff --git a/gns3server/handlers/api/project_handler.py b/gns3server/handlers/api/project_handler.py
index 3c4a0fa2..da0423fe 100644
--- a/gns3server/handlers/api/project_handler.py
+++ b/gns3server/handlers/api/project_handler.py
@@ -368,7 +368,7 @@ class ProjectHandler:
         response.content_length = None
         response.start(request)
 
-        for data in project.export(include_images=bool(request.GET.get("images", "0"))):
+        for data in project.export(include_images=bool(request.GET.get("include_images", "0"))):
             response.write(data)
             yield from response.drain()
 
diff --git a/gns3server/modules/docker/__init__.py b/gns3server/modules/docker/__init__.py
index be218441..89dc3679 100644
--- a/gns3server/modules/docker/__init__.py
+++ b/gns3server/modules/docker/__init__.py
@@ -29,7 +29,6 @@ from gns3server.utils import parse_version
 log = logging.getLogger(__name__)
 
 from ..base_manager import BaseManager
-from ..project_manager import ProjectManager
 from .docker_vm import DockerVM
 from .docker_error import *
 
@@ -59,7 +58,7 @@ class Docker(BaseManager):
                 raise DockerError("Can't connect to docker daemon")
 
             if parse_version(version["ApiVersion"]) < parse_version(DOCKER_MINIMUM_API_VERSION):
-                raise DockerError("Docker API version is {}. But GNS3 require a minimum API version {}".format(version["ApiVersion"], DOCKER_MINIMUM_API_VERSION))
+                raise DockerError("Docker API version is {}. GNS3 requires a minimum API version of {}".format(version["ApiVersion"], DOCKER_MINIMUM_API_VERSION))
         return self._connector
 
     def __del__(self):
diff --git a/gns3server/modules/project.py b/gns3server/modules/project.py
index c1db86e0..2acbc836 100644
--- a/gns3server/modules/project.py
+++ b/gns3server/modules/project.py
@@ -594,7 +594,7 @@ class Project:
                     for prop, value in node["properties"].items():
                         if prop.endswith("image"):
                             node["properties"][prop] = os.path.basename(value)
-                            if include_images:
+                            if include_images is True:
                                 self._export_images(value, node["type"], z)
         z.writestr("project.gns3", json.dumps(topology).encode())