diff --git a/taiga/base/filters.py b/taiga/base/filters.py
index f7ea91bb..12651e6f 100644
--- a/taiga/base/filters.py
+++ b/taiga/base/filters.py
@@ -250,6 +250,7 @@ class MembersFilterBackend(PermissionBasedFilterBackend):
         if request.user.is_authenticated() and request.user.is_superuser:
             qs = qs
         elif request.user.is_authenticated():
+            Membership = apps.get_model('projects', 'Membership')
             memberships_qs = Membership.objects.filter(user=request.user)
             if project_id:
                 memberships_qs = memberships_qs.filter(project_id=project_id)
diff --git a/taiga/permissions/service.py b/taiga/permissions/service.py
index 75376229..3ee86821 100644
--- a/taiga/permissions/service.py
+++ b/taiga/permissions/service.py
@@ -103,3 +103,12 @@ def get_user_project_permissions(user, project):
         anon_permissions = project.anon_permissions if project.anon_permissions is not None else []
 
     return set(owner_permissions + members_permissions + public_permissions + anon_permissions)
+
+
+def set_base_permissions_for_public_project(project):
+    """
+    If a project is public anonymous and registered users should have at least visualization permissions
+    """
+    anon_permissions = list(map(lambda perm: perm[0], ANON_PERMISSIONS))
+    project.anon_permissions = list(set(project.anon_permissions + anon_permissions))
+    project.public_permissions = list(set(project.public_permissions + anon_permissions))
diff --git a/taiga/projects/api.py b/taiga/projects/api.py
index 0f17c668..3f64ba8e 100644
--- a/taiga/projects/api.py
+++ b/taiga/projects/api.py
@@ -36,6 +36,7 @@ from taiga.projects.mixins.on_destroy import MoveOnDestroyMixin
 from taiga.projects.userstories.models import UserStory
 from taiga.projects.tasks.models import Task
 from taiga.projects.issues.models import Issue
+from taiga.permissions import service as permissions_service
 
 from . import serializers
 from . import models
@@ -46,7 +47,6 @@ from .votes import serializers as votes_serializers
 from .votes import services as votes_service
 from .votes.utils import attach_votescount_to_queryset
 
-
 ######################################################
 ## Project
 ######################################################
@@ -176,6 +176,10 @@ class ProjectViewSet(ModelCrudViewSet):
         if not obj.id:
             obj.template = self.request.QUERY_PARAMS.get('template', None)
 
+        # Update anon permissions if the project is public
+        if obj.is_private == False:
+            permissions_service.set_base_permissions_for_public_project(obj)
+
         super().pre_save(obj)
 
     def destroy(self, request, *args, **kwargs):
diff --git a/tests/integration/test_projects.py b/tests/integration/test_projects.py
index 29a1966f..f7c01b14 100644
--- a/tests/integration/test_projects.py
+++ b/tests/integration/test_projects.py
@@ -2,6 +2,7 @@ from django.core.urlresolvers import reverse
 from taiga.base.utils import json
 from taiga.projects.services import stats as stats_services
 from taiga.projects.history.services import take_snapshot
+from taiga.permissions.permissions import ANON_PERMISSIONS
 
 from .. import factories as f
 
@@ -235,3 +236,19 @@ def test_edit_membership_only_owner(client):
     response = client.json.patch(url, json.dumps(data))
     assert response.status_code == 400
     assert response.data["is_owner"][0] == "At least one of the user must be an active admin"
+
+
+def test_anon_permissions_generation_when_making_project_public(client):
+    user = f.UserFactory.create()
+    project = f.ProjectFactory.create(is_private=True)
+    role = f.RoleFactory.create(project=project, permissions=["view_project", "modify_project"])
+    membership = f.MembershipFactory.create(project=project, user=user, role=role, is_owner=True)
+    assert project.anon_permissions == []
+    client.login(user)
+    url = reverse("projects-detail", kwargs={"pk": project.pk})
+    data = {"is_private": False}
+    response = client.json.patch(url, json.dumps(data))
+    assert response.status_code == 200
+    anon_permissions = list(map(lambda perm: perm[0], ANON_PERMISSIONS))
+    assert set(anon_permissions).issubset(set(response.data["anon_permissions"]))
+    assert set(anon_permissions).issubset(set(response.data["public_permissions"]))