diff --git a/settings/common.py b/settings/common.py
index f227d97c..3ee3b3f3 100644
--- a/settings/common.py
+++ b/settings/common.py
@@ -477,10 +477,6 @@ THUMBNAIL_ALIASES = {
     },
 }
 
-# GRAVATAR_DEFAULT_AVATAR = "img/user-noimage.png"
-GRAVATAR_DEFAULT_AVATAR = ""
-GRAVATAR_AVATAR_SIZE = THN_AVATAR_SIZE
-
 TAGS_PREDEFINED_COLORS = ["#fce94f", "#edd400", "#c4a000", "#8ae234",
                           "#73d216", "#4e9a06", "#d3d7cf", "#fcaf3e",
                           "#f57900", "#ce5c00", "#729fcf", "#3465a4",
diff --git a/taiga/projects/history/serializers.py b/taiga/projects/history/serializers.py
index 224cc6df..0f2dc658 100644
--- a/taiga/projects/history/serializers.py
+++ b/taiga/projects/history/serializers.py
@@ -19,7 +19,8 @@
 from taiga.base.api import serializers
 from taiga.base.fields import I18NJsonField, Field, MethodField
 
-from taiga.users.services import get_user_photo_or_gravatar_url
+from taiga.users.services import get_user_photo_url
+from taiga.users.gravatar import get_user_gravatar_id
 
 
 HISTORY_ENTRY_I18N_FIELDS = ("points", "status", "severity", "priority", "type")
@@ -46,7 +47,8 @@ class HistoryEntrySerializer(serializers.LightSerializer):
     def get_user(self, entry):
         user = {"pk": None, "username": None, "name": None, "photo": None, "is_active": False}
         user.update(entry.user)
-        user["photo"] = get_user_photo_or_gravatar_url(entry.owner)
+        user["photo"] = get_user_photo_url(entry.owner)
+        user["gravatar_id"] = get_user_gravatar_id(entry.owner)
 
         if entry.owner:
             user["is_active"] = entry.owner.is_active
diff --git a/taiga/projects/serializers.py b/taiga/projects/serializers.py
index d4c93155..1d8a5799 100644
--- a/taiga/projects/serializers.py
+++ b/taiga/projects/serializers.py
@@ -22,7 +22,8 @@ from taiga.base.api import serializers
 from taiga.base.fields import Field, MethodField, I18NField
 
 from taiga.permissions import services as permissions_services
-from taiga.users.services import get_user_photo_or_gravatar_url, get_photo_or_gravatar_url
+from taiga.users.services import get_photo_url, get_user_photo_url
+from taiga.users.gravatar import get_gravatar_id, get_user_gravatar_id
 from taiga.users.serializers import UserBasicInfoSerializer
 
 from taiga.permissions.services import calculate_permissions
@@ -106,12 +107,16 @@ class MembershipDictSerializer(serializers.LightDictSerializer):
     color = Field()
     username = Field()
     photo = MethodField()
+    gravatar_id = MethodField()
 
     def get_full_name_display(self, obj):
         return obj["full_name"] or obj["username"] or obj["email"]
 
     def get_photo(self, obj):
-        return get_photo_or_gravatar_url(obj['photo'], obj['email'])
+        return get_photo_url(obj['photo'])
+
+    def get_gravatar_id(self, obj):
+        return get_gravatar_id(obj['email'])
 
 
 class MembershipSerializer(serializers.LightSerializer):
@@ -129,6 +134,7 @@ class MembershipSerializer(serializers.LightSerializer):
     is_user_active = MethodField()
     color = MethodField()
     photo = MethodField()
+    gravatar_id = MethodField()
     project_name = MethodField()
     project_slug = MethodField()
     invited_by = UserBasicInfoSerializer()
@@ -147,7 +153,10 @@ class MembershipSerializer(serializers.LightSerializer):
         return obj.user.color if obj.user else None
 
     def get_photo(self, obj):
-        return get_user_photo_or_gravatar_url(obj.user)
+        return get_user_photo_url(obj.user)
+
+    def get_gravatar_id(self, obj):
+        return get_user_gravatar_id(obj.user)
 
     def get_project_name(self, obj):
         return obj.project.name if obj and obj.project else ""
diff --git a/taiga/timeline/serializers.py b/taiga/timeline/serializers.py
index a7f607c9..0b831d04 100644
--- a/taiga/timeline/serializers.py
+++ b/taiga/timeline/serializers.py
@@ -20,7 +20,8 @@ from django.contrib.auth import get_user_model
 
 from taiga.base.api import serializers
 from taiga.base.fields import Field, MethodField
-from taiga.users.services import get_user_photo_or_gravatar_url, get_big_photo_or_gravatar_url
+from taiga.users.services import get_user_photo_url, get_user_big_photo_url
+from taiga.users.gravatar import get_user_gravatar_id
 
 from . import models
 
@@ -56,8 +57,9 @@ class TimelineSerializer(serializers.LightSerializer):
             obj.data["user"] = {
                 "id": user.pk,
                 "name": user.get_full_name(),
-                "photo": get_user_photo_or_gravatar_url(user),
-                "big_photo": get_big_photo_or_gravatar_url(user),
+                "photo": get_user_photo_url(user),
+                "big_photo": get_user_big_photo_url(user),
+                "gravatar_id": get_user_gravatar_id(user),
                 "username": user.username,
                 "is_profile_visible": user.is_active and not user.is_system,
                 "date_joined": user.date_joined
diff --git a/taiga/users/gravatar.py b/taiga/users/gravatar.py
index 7793e59d..b8329d95 100644
--- a/taiga/users/gravatar.py
+++ b/taiga/users/gravatar.py
@@ -18,45 +18,22 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import hashlib
-import copy
-
-from urllib.parse import urlencode
-
-from django.conf import settings
-from django.templatetags.static import static
-
-GRAVATAR_BASE_URL = "//www.gravatar.com/avatar/{}?{}"
 
 
-def get_gravatar_url(email: str, **options) -> str:
-    """Get the gravatar url associated to an email.
+def get_gravatar_id(email: str) -> str:
+    """Get the gravatar id associated to an email.
 
-    :param options: Additional options to gravatar.
-    - `default` defines what image url to show if no gravatar exists
-    - `size` defines the size of the avatar.
-
-    :return: Gravatar url.
+    :return: Gravatar id.
     """
 
-    params = copy.copy(options)
+    return hashlib.md5(email.lower().encode()).hexdigest()
 
-    default_avatar = getattr(settings, "GRAVATAR_DEFAULT_AVATAR", None)
-    default_size = getattr(settings, "GRAVATAR_AVATAR_SIZE", None)
+def get_user_gravatar_id(user: object) -> str:
+    """Get the gravatar id associated to a user.
 
-    avatar = options.get("default", None)
-    size = options.get("size", None)
+    :return: Gravatar id.
+    """
+    if user and user.email:
+        return get_gravatar_id(user.email)
 
-    if avatar:
-        params["default"] = avatar
-    elif default_avatar:
-        params["default"] = static(default_avatar)
-
-    if size:
-        params["size"] = size
-    elif default_size:
-        params["size"] = default_size
-
-    email_hash = hashlib.md5(email.lower().encode()).hexdigest()
-    url = GRAVATAR_BASE_URL.format(email_hash, urlencode(params))
-
-    return url
+    return None
diff --git a/taiga/users/serializers.py b/taiga/users/serializers.py
index a943183d..76fa6141 100644
--- a/taiga/users/serializers.py
+++ b/taiga/users/serializers.py
@@ -24,8 +24,8 @@ from taiga.base.fields import PgArrayField, Field, MethodField, I18NField
 from taiga.base.utils.thumbnails import get_thumbnail_url
 
 from taiga.projects.models import Project
-from .services import get_user_photo_or_gravatar_url, get_big_photo_or_gravatar_url
-from .gravatar import get_gravatar_url
+from .services import get_user_photo_url, get_big_photo_url, get_user_big_photo_url
+from taiga.users.gravatar import get_user_gravatar_id
 
 from collections import namedtuple
 
@@ -53,7 +53,7 @@ class UserSerializer(serializers.LightSerializer):
     is_active = Field()
     photo = MethodField()
     big_photo = MethodField()
-    gravatar_url = MethodField()
+    gravatar_id = MethodField()
     roles = MethodField()
     projects_with_me = MethodField()
 
@@ -61,13 +61,13 @@ class UserSerializer(serializers.LightSerializer):
         return obj.get_full_name() if obj else ""
 
     def get_photo(self, user):
-        return get_user_photo_or_gravatar_url(user)
+        return get_user_photo_url(user)
 
     def get_big_photo(self, user):
-        return get_big_photo_or_gravatar_url(user)
+        return get_user_big_photo_url(user)
 
-    def get_gravatar_url(self, user):
-        return get_gravatar_url(user.email)
+    def get_gravatar_id(self, user):
+        return get_user_gravatar_id(user)
 
     def get_roles(self, user):
         return user.memberships. order_by("role__name").values_list("role__name", flat=True).distinct()
@@ -108,6 +108,7 @@ class UserBasicInfoSerializer(serializers.LightSerializer):
     full_name_display = MethodField()
     photo = MethodField()
     big_photo = MethodField()
+    gravatar_id = MethodField()
     is_active = Field()
     id = Field()
 
@@ -115,10 +116,13 @@ class UserBasicInfoSerializer(serializers.LightSerializer):
         return obj.get_full_name()
 
     def get_photo(self, obj):
-        return get_user_photo_or_gravatar_url(obj)
+        return get_user_photo_url(obj)
 
     def get_big_photo(self, obj):
-        return get_big_photo_or_gravatar_url(obj)
+        return get_user_big_photo_url(obj)
+
+    def get_gravatar_id(self, obj):
+        return get_user_gravatar_id(obj)
 
     def to_value(self, instance):
         if instance is None:
@@ -181,6 +185,7 @@ class HighLightedContentSerializer(serializers.LightSerializer):
     assigned_to_username = Field()
     assigned_to_full_name = Field()
     assigned_to_photo = MethodField()
+    assigned_to_gravatar_id = MethodField()
 
     is_watcher = MethodField()
     total_watchers = Field()
@@ -237,7 +242,16 @@ class HighLightedContentSerializer(serializers.LightSerializer):
 
         UserData = namedtuple("UserData", ["photo", "email"])
         user_data = UserData(photo=obj.assigned_to_photo, email=obj.assigned_to_email or "")
-        return get_user_photo_or_gravatar_url(user_data)
+        return get_user_photo_url(user_data)
+
+    def get_assigned_to_gravatar_id(self, obj):
+        type = getattr(obj, "type", "")
+        if type == "project":
+            return None
+
+        UserData = namedtuple("UserData", ["photo", "email"])
+        user_data = UserData(photo=obj.assigned_to_photo, email=obj.assigned_to_email or "")
+        return get_user_gravatar_id(user_data)
 
     def get_tags_colors(self, obj):
         tags = getattr(obj, "tags", [])
diff --git a/taiga/users/services.py b/taiga/users/services.py
index 73ae2d74..98b813b1 100644
--- a/taiga/users/services.py
+++ b/taiga/users/services.py
@@ -37,9 +37,6 @@ from taiga.base.utils.urls import get_absolute_url
 from taiga.projects.notifications.choices import NotifyLevel
 from taiga.projects.notifications.services import get_projects_watched
 
-from .gravatar import get_gravatar_url
-
-
 
 def get_user_by_username_or_email(username_or_email):
     user_model = get_user_model()
@@ -75,6 +72,8 @@ def get_and_validate_user(*, username:str, password:str) -> bool:
 
 def get_photo_url(photo):
     """Get a photo absolute url and the photo automatically cropped."""
+    if not photo:
+        return None
     try:
         url = get_thumbnailer(photo)[settings.THN_AVATAR_SMALL].url
         return get_absolute_url(url)
@@ -82,24 +81,17 @@ def get_photo_url(photo):
         return None
 
 
-def get_photo_or_gravatar_url(photo=None, email=None):
-    """Get the user's photo/gravatar url."""
-    if photo:
-        return get_photo_url(photo)
-    if email:
-        return get_gravatar_url(email)
-    return settings.GRAVATAR_DEFAULT_AVATAR
-
-
-def get_user_photo_or_gravatar_url(user):
-    """Get the user's photo/gravatar url."""
-    if user:
-        return get_photo_url(user.photo) if user.photo else get_gravatar_url(user.email)
-    return settings.GRAVATAR_DEFAULT_AVATAR
+def get_user_photo_url(user):
+    """Get the user's photo url."""
+    if not user:
+        return None
+    return get_photo_url(user.photo)
 
 
 def get_big_photo_url(photo):
     """Get a big photo absolute url and the photo automatically cropped."""
+    if not photo:
+        return None
     try:
         url = get_thumbnailer(photo)[settings.THN_AVATAR_BIG].url
         return get_absolute_url(url)
@@ -107,15 +99,11 @@ def get_big_photo_url(photo):
         return None
 
 
-def get_big_photo_or_gravatar_url(user):
-    """Get the user's big photo/gravatar url."""
+def get_user_big_photo_url(user):
+    """Get the user's big photo url."""
     if not user:
-        return ""
-
-    if user.photo:
-        return get_big_photo_url(user.photo)
-    else:
-        return get_gravatar_url(user.email, size=settings.THN_AVATAR_BIG_SIZE)
+        return None
+    return get_big_photo_url(user.photo)
 
 
 def get_visible_project_ids(from_user, by_user):
diff --git a/taiga/webhooks/serializers.py b/taiga/webhooks/serializers.py
index f08f4ae7..61eea6cb 100644
--- a/taiga/webhooks/serializers.py
+++ b/taiga/webhooks/serializers.py
@@ -24,14 +24,14 @@ from taiga.front.templatetags.functions import resolve as resolve_front_url
 
 from taiga.projects.services import get_logo_big_thumbnail_url
 
-from taiga.users.gravatar import get_gravatar_url
-from taiga.users.services import get_user_photo_or_gravatar_url
-
+from taiga.users.services import get_user_photo_url
+from taiga.users.gravatar import get_user_gravatar_id
 
 ########################################################################
 # WebHooks
 ########################################################################
 
+
 class WebhookSerializer(serializers.LightSerializer):
     id = Field()
     project = Field(attr="project_id")
@@ -64,17 +64,14 @@ class WebhookLogSerializer(serializers.LightSerializer):
 class UserSerializer(serializers.LightSerializer):
     id = Field(attr="pk")
     permalink = MethodField()
-    gravatar_url = MethodField()
     username = MethodField()
     full_name = MethodField()
     photo = MethodField()
+    gravatar_id = MethodField()
 
     def get_permalink(self, obj):
         return resolve_front_url("user", obj.username)
 
-    def get_gravatar_url(self, obj):
-        return get_gravatar_url(obj.email)
-
     def get_username(self, obj):
         return obj.get_username()
 
@@ -82,7 +79,10 @@ class UserSerializer(serializers.LightSerializer):
         return obj.get_full_name()
 
     def get_photo(self, obj):
-        return get_user_photo_or_gravatar_url(obj)
+        return get_user_photo_url(obj)
+
+    def get_gravatar_id(self, obj):
+        return get_user_gravatar_id(obj)
 
     def to_value(self, instance):
         if instance is None:
diff --git a/tests/unit/test_gravatar.py b/tests/unit/test_gravatar.py
deleted file mode 100644
index b6246fa8..00000000
--- a/tests/unit/test_gravatar.py
+++ /dev/null
@@ -1,31 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright (C) 2014-2016 Andrey Antukh <niwi@niwi.nz>
-# Copyright (C) 2014-2016 Jesús Espino <jespinog@gmail.com>
-# Copyright (C) 2014-2016 David Barragán <bameda@dbarragan.com>
-# Copyright (C) 2014-2016 Alejandro Alonso <alejandro.alonso@kaleidos.net>
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as
-# published by the Free Software Foundation, either version 3 of the
-# License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-#
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-import hashlib
-
-from taiga.users.gravatar import get_gravatar_url
-
-
-def test_get_gravatar_url():
-    email = "user@email.com"
-    email_hash = hashlib.md5(email.encode()).hexdigest()
-    url = get_gravatar_url(email, s=40, d="default-image-url")
-
-    assert email_hash in url
-    assert 's=40' in url
-    assert 'd=default-image-url' in url