diff --git a/gns3server/controller/export_project.py b/gns3server/controller/export_project.py
index df727574..b8cd5a0c 100644
--- a/gns3server/controller/export_project.py
+++ b/gns3server/controller/export_project.py
@@ -16,6 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import os
+import sys
 import json
 import asyncio
 import aiohttp
@@ -23,6 +24,7 @@ import zipfile
 import tempfile
 import zipstream
 
+from datetime import datetime
 
 import logging
 log = logging.getLogger(__name__)
@@ -77,6 +79,7 @@ def export_project(project, temporary_dir, include_images=False, keep_compute_id
             # ignore the .gns3 file
             if file.endswith(".gns3"):
                 continue
+            _patch_mtime(path)
             zstream.write(path, os.path.relpath(path, project._path), compress_type=zipfile.ZIP_DEFLATED)
 
     # Export files from remote computes
@@ -99,12 +102,29 @@ def export_project(project, temporary_dir, include_images=False, keep_compute_id
                         f.write(data)
                     response.close()
                     f.close()
+                    _patch_mtime(temp_path)
                     zstream.write(temp_path, arcname=compute_file["path"], compress_type=zipfile.ZIP_DEFLATED)
                     downloaded_files.add(compute_file['path'])
 
     return zstream
 
 
+def _patch_mtime(path):
+    """
+    Patch the file mtime because ZIP does not support timestamps before 1980
+
+    :param path: file path
+    """
+
+    if sys.platform.startswith("win"):
+        # only UNIX type platforms
+        return
+    st = os.stat(path)
+    file_date = datetime.fromtimestamp(st.st_mtime)
+    if file_date.year < 1980:
+        new_mtime = file_date.replace(year=1980).timestamp()
+        os.utime(path, (st.st_atime, new_mtime))
+
 def _is_exportable(path):
     """
     :returns: True if file should not be included in the final archive
@@ -228,6 +248,7 @@ def _export_local_image(image, zstream):
 
         if os.path.exists(path):
             arcname = os.path.join("images", directory, os.path.basename(image))
+            _patch_mtime(path)
             zstream.write(path, arcname)
             return
 
diff --git a/gns3server/controller/snapshot.py b/gns3server/controller/snapshot.py
index 70c3d173..cbae0429 100644
--- a/gns3server/controller/snapshot.py
+++ b/gns3server/controller/snapshot.py
@@ -101,7 +101,7 @@ class Snapshot:
             with tempfile.TemporaryDirectory() as tmpdir:
                 zipstream = yield from export_project(self._project, tmpdir, keep_compute_id=True, allow_all_nodes=True)
                 yield from wait_run_in_executor(self._create_snapshot_file, zipstream)
-        except OSError as e:
+        except (ValueError, OSError, RuntimeError) as e:
             raise aiohttp.web.HTTPConflict(text="Could not create snapshot file '{}': {}".format(self.path, e))
 
     @asyncio.coroutine
diff --git a/gns3server/handlers/api/controller/project_handler.py b/gns3server/handlers/api/controller/project_handler.py
index 46e17661..37137ca2 100644
--- a/gns3server/handlers/api/controller/project_handler.py
+++ b/gns3server/handlers/api/controller/project_handler.py
@@ -304,8 +304,8 @@ class ProjectHandler:
                 yield from response.write_eof()
         # Will be raise if you have no space left or permission issue on your temporary directory
         # RuntimeError: something was wrong during the zip process
-        except (OSError, RuntimeError) as e:
-            raise aiohttp.web.HTTPNotFound(text="Can't export project: {}".format(str(e)))
+        except (ValueError, OSError, RuntimeError) as e:
+            raise aiohttp.web.HTTPNotFound(text="Cannot export project: {}".format(str(e)))
 
     @Route.post(
         r"/projects/{project_id}/import",