diff --git a/taiga/base/utils/diff.py b/taiga/base/utils/diff.py
new file mode 100644
index 00000000..cff9b15e
--- /dev/null
+++ b/taiga/base/utils/diff.py
@@ -0,0 +1,36 @@
+# Copyright (C) 2014 Andrey Antukh <niwi@niwi.be>
+# Copyright (C) 2014 Jesús Espino <jespinog@gmail.com>
+# Copyright (C) 2014 David Barragán <bameda@dbarragan.com>
+# 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/>.
+
+
+def make_diff(first:dict, second:dict, not_found_value=None) -> dict:
+    """
+    Compute a diff between two dicts.
+    """
+    diff = {}
+
+    # Check all keys in first dict
+    for key in first:
+        if key not in second:
+            diff[key] = (first[key], not_found_value)
+        elif first[key] != second[key]:
+            diff[key] = (first[key], second[key])
+
+    # Check all keys in second dict to find missing
+    for key in second:
+        if key not in first:
+            diff[key] = (not_found_value, second[key])
+
+    return diff
diff --git a/taiga/projects/history/models.py b/taiga/projects/history/models.py
index cbbb5085..e2e1f67b 100644
--- a/taiga/projects/history/models.py
+++ b/taiga/projects/history/models.py
@@ -26,6 +26,8 @@ from taiga.mdrender.service import get_diff_of_htmls
 from .choices import HistoryType
 from .choices import HISTORY_TYPE_CHOICES
 
+from taiga.base.utils.diff import make_diff as make_diff_from_dicts
+
 
 class HistoryEntry(models.Model):
     """
@@ -144,7 +146,11 @@ class HistoryEntry(models.Model):
                 for aid in set(tuple(oldattachs.keys()) + tuple(newattachs.keys())):
                     if aid in oldattachs and aid in newattachs:
                         if oldattachs[aid] != newattachs[aid]:
-                            attachments["changed"].append([oldattachs[aid],newattachs[aid]])
+                            change = {
+                                "filename": oldattachs[aid]["filename"],
+                                "changes": make_diff_from_dicts(oldattachs[aid], newattachs[aid])
+                            }
+                            attachments["changed"].append(change)
                     elif aid in oldattachs and aid not in newattachs:
                         attachments["deleted"].append(oldattachs[aid])
                     elif aid not in oldattachs and aid in newattachs:
diff --git a/taiga/projects/history/services.py b/taiga/projects/history/services.py
index e04068ed..209e21c9 100644
--- a/taiga/projects/history/services.py
+++ b/taiga/projects/history/services.py
@@ -40,6 +40,7 @@ from django.db import transaction as tx
 
 from taiga.mdrender.service import render as mdrender
 from taiga.base.utils.db import get_typename_for_model_class
+from taiga.base.utils.diff import make_diff as make_diff_from_dicts
 
 from .models import HistoryType
 
@@ -145,20 +146,7 @@ def make_diff(oldobj:FrozenObj, newobj:FrozenObj) -> FrozenDiff:
     first = oldobj.snapshot
     second = newobj.snapshot
 
-    diff = {}
-    not_found_value = None
-
-    # Check all keys in first dict
-    for key in first:
-        if key not in second:
-            diff[key] = (first[key], not_found_value)
-        elif first[key] != second[key]:
-            diff[key] = (first[key], second[key])
-
-    # Check all keys in second dict to find missing
-    for key in second:
-        if key not in first:
-            diff[key] = (not_found_value, second[key])
+    diff = make_diff_from_dicts(first, second)
 
     return FrozenDiff(newobj.key, diff, newobj.snapshot)
 
diff --git a/taiga/projects/history/templates/emails/includes/fields_diff-html.jinja b/taiga/projects/history/templates/emails/includes/fields_diff-html.jinja
index 769a0579..c6fe66f7 100644
--- a/taiga/projects/history/templates/emails/includes/fields_diff-html.jinja
+++ b/taiga/projects/history/templates/emails/includes/fields_diff-html.jinja
@@ -49,11 +49,16 @@
 
                 {% for att in values['changed'] %}
                 <dd style="background: #eee; padding: 5px 15px; color: #444">
-                    <i>{{ att.1.filename|linebreaksbr }}  {% if att.1.description %}({{ att.1.description|linebreaksbr }}){% endif %}</i>
-                    {% if att.1.is_deprecated and not att.0.is_deprecated %}
-                        to <b>deprecated</b>
-                    {% elif not att.1.is_deprecated and att.0.is_deprecated %}
-                        to <b>not deprecated</b>
+                    <b>{{ att.filename|linebreaksbr }}</b>
+                    {% if att.changes.is_deprecated %}
+                        {% if att.changes.is_deprecated.1 %}
+                            to <i>deprecated</i>
+                        {% else %}
+                            to <i>not deprecated</i>
+                        {% endif %}
+                    {% endif %}
+                    {% if att.changes.description %}
+                        to <i>att.changes.description.1</i>
                     {% endif %}
                 </dd>
                 {% endfor %}
diff --git a/taiga/projects/history/templates/emails/includes/fields_diff-text.jinja b/taiga/projects/history/templates/emails/includes/fields_diff-text.jinja
index 7ee49bfe..c87e318a 100644
--- a/taiga/projects/history/templates/emails/includes/fields_diff-text.jinja
+++ b/taiga/projects/history/templates/emails/includes/fields_diff-text.jinja
@@ -22,7 +22,7 @@
             {% if values.changed %}
         * {{ _("Changed") }}
                 {% for att in values['changed'] %}
-            - {{ att.1.filename|linebreaksbr }}
+            - {{ att.filename|linebreaksbr }}
                 {% endfor %}
             {% endif %}