diff --git a/taiga/projects/history/freeze_impl.py b/taiga/projects/history/freeze_impl.py
index 1af7bcf0..7b85b7c0 100644
--- a/taiga/projects/history/freeze_impl.py
+++ b/taiga/projects/history/freeze_impl.py
@@ -228,6 +228,9 @@ def userstory_freezer(us) -> dict:
         "tags": us.tags,
         "points": points,
         "from_issue": us.generated_from_issue_id,
+        "is_blocked": us.is_blocked,
+        "blocked_note": us.blocked_note,
+        "blocked_note_html": mdrender(us.project, us.blocked_note),
     }
 
     return snapshot
@@ -249,6 +252,9 @@ def issue_freezer(issue) -> dict:
         "watchers": [x.pk for x in issue.watchers.all()],
         "attachments": extract_attachments(issue),
         "tags": issue.tags,
+        "is_blocked": issue.is_blocked,
+        "blocked_note": issue.blocked_note,
+        "blocked_note_html": mdrender(issue.project, issue.blocked_note),
     }
 
     return snapshot
@@ -271,6 +277,9 @@ def task_freezer(task) -> dict:
         "tags": task.tags,
         "user_story": task.user_story_id,
         "is_iocaine": task.is_iocaine,
+        "is_blocked": task.is_blocked,
+        "blocked_note": task.blocked_note,
+        "blocked_note_html": mdrender(task.project, task.blocked_note),
     }
 
     return snapshot
diff --git a/taiga/projects/history/models.py b/taiga/projects/history/models.py
index 0cf9d0e5..462e3d45 100644
--- a/taiga/projects/history/models.py
+++ b/taiga/projects/history/models.py
@@ -99,6 +99,19 @@ class HistoryEntry(models.Model):
         result = {}
         users_keys = ["assigned_to", "owner"]
 
+        def resolve_diff_value(key):
+            value = None
+            diff = get_diff_of_htmls(
+                self.diff[key][0] or "",
+                self.diff[key][1] or ""
+            )
+
+            if diff:
+                key = "{}_diff".format(key)
+                value = (None, diff)
+
+            return (key, value)
+
         def resolve_value(field, key):
             data = self.values[field]
             key = str(key)
@@ -114,24 +127,12 @@ class HistoryEntry(models.Model):
             #       on old HistoryEntry objects.
             if key == "description_diff":
                 continue
-            elif key == "description":
-                description_diff = get_diff_of_htmls(
-                    self.diff[key][0],
-                    self.diff[key][1]
-                )
-
-                if description_diff:
-                    key = "description_diff"
-                    value = (None, description_diff)
-            elif key == "content":
-                content_diff = get_diff_of_htmls(
-                    self.diff[key][0],
-                    self.diff[key][1]
-                )
-
-                if content_diff:
-                    key = "content_diff"
-                    value = (None, content_diff)
+            elif key == "content_diff":
+                continue
+            elif key == "blocked_note_diff":
+                continue
+            elif key in["description", "content", "blocked_note"]:
+                (key, value) = resolve_diff_value(key)
             elif key in users_keys:
                 value = [resolve_value("users", x) for x in self.diff[key]]
             elif key == "watchers":
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 d53a205b..b2d23b7c 100644
--- a/taiga/projects/history/templates/emails/includes/fields_diff-text.jinja
+++ b/taiga/projects/history/templates/emails/includes/fields_diff-text.jinja
@@ -6,7 +6,9 @@
     "backlog_order",
     "kanban_order",
     "taskboard_order",
-    "us_order"
+    "us_order",
+    "blocked_note_diff",
+    "blocked_note_html"
 ] %}
 {% for field_name, values in changed_fields.items() %}
     {% if field_name not in excluded_fields %}
diff --git a/taiga/projects/history/templatetags/functions.py b/taiga/projects/history/templatetags/functions.py
index c66ef67f..1938bb94 100644
--- a/taiga/projects/history/templatetags/functions.py
+++ b/taiga/projects/history/templatetags/functions.py
@@ -23,7 +23,8 @@ register = library.Library()
 
 EXTRA_FIELD_VERBOSE_NAMES = {
     "description_diff": _("description"),
-    "content_diff": _("content")
+    "content_diff": _("content"),
+    "blocked_note_diff": _("blocked note")
 }