diff --git a/taiga/export_import/serializers.py b/taiga/export_import/serializers.py
index ceb8263f..74df0cbc 100644
--- a/taiga/export_import/serializers.py
+++ b/taiga/export_import/serializers.py
@@ -43,7 +43,6 @@ from taiga.projects.wiki import models as wiki_models
 from taiga.projects.history import models as history_models
 from taiga.projects.attachments import models as attachments_models
 from taiga.timeline import models as timeline_models
-from taiga.timeline import service as timeline_service
 from taiga.users import models as users_models
 from taiga.projects.notifications import services as notifications_services
 from taiga.projects.votes import services as votes_service
@@ -674,12 +673,7 @@ class ProjectExportSerializer(WatcheableObjectModelSerializer):
     issues = IssueExportSerializer(many=True, required=False)
     wiki_links = WikiLinkExportSerializer(many=True, required=False)
     wiki_pages = WikiPageExportSerializer(many=True, required=False)
-    timeline = serializers.SerializerMethodField("get_timeline")
 
     class Meta:
         model = projects_models.Project
         exclude = ('id', 'creation_template', 'members')
-
-    def get_timeline(self, obj):
-        timeline_qs = timeline_service.get_project_timeline(obj)
-        return TimelineExportSerializer(timeline_qs, many=True).data
diff --git a/taiga/export_import/service.py b/taiga/export_import/service.py
index fe1fafec..f4f5326d 100644
--- a/taiga/export_import/service.py
+++ b/taiga/export_import/service.py
@@ -31,7 +31,7 @@ from django.core.files.storage import default_storage
 
 from taiga.base.utils import json
 from taiga.projects.history.services import make_key_from_model_object, take_snapshot
-from taiga.timeline.service import build_project_namespace
+from taiga.timeline.service import build_project_namespace, get_project_timeline
 from taiga.projects.references import sequences as seq
 from taiga.projects.references import models as refs
 from taiga.projects.userstories.models import RolePoints
@@ -132,7 +132,22 @@ def render_project(project, outfile, chunk_size = 8190):
             value = field.field_to_native(project, field_name)
             outfile.write('"{}": {}'.format(field_name, json.dumps(value)))
 
-    outfile.write('}\n')
+    # Generate the timeline
+    outfile.write(',\n"timeline": [\n')
+    first_timeline = True
+    for timeline_item in get_project_timeline(project).iterator():
+        # Avoid writing "," in the last element
+        if not first_timeline:
+            outfile.write(",\n")
+        else:
+            first_timeline = False
+
+        dumped_value = json.dumps(serializers.TimelineExportSerializer(timeline_item).data)
+        outfile.write(dumped_value)
+        outfile.flush()
+        gc.collect()
+
+    outfile.write(']}\n')
 
 
 def store_project(data):