diff --git a/partner_programs/serializers.py b/partner_programs/serializers.py
index 3bd6a09a..43e2806f 100644
--- a/partner_programs/serializers.py
+++ b/partner_programs/serializers.py
@@ -80,7 +80,9 @@ class PartnerProgramForMemberSerializer(PartnerProgramBaseSerializerMixin):
 
     views_count = serializers.SerializerMethodField(method_name="count_views")
     links = serializers.SerializerMethodField(method_name="get_links")
-    is_user_manager = serializers.SerializerMethodField(method_name="get_is_user_manager")
+    is_user_manager = serializers.SerializerMethodField(
+        method_name="get_is_user_manager"
+    )
 
     def count_views(self, program):
         return get_views_count(program)
diff --git a/partner_programs/services.py b/partner_programs/services.py
index b10e23c4..1aac24fc 100644
--- a/partner_programs/services.py
+++ b/partner_programs/services.py
@@ -1,6 +1,8 @@
 import logging
 from collections import OrderedDict
 
+from openpyxl.cell.cell import ILLEGAL_CHARACTERS_RE
+
 from partner_programs.models import PartnerProgramUserProfile
 from project_rates.models import Criteria, ProjectScore
 
@@ -132,6 +134,31 @@ def get_project_scores_info(self) -> dict[str, str]:
     ("team_size", "Количество человек в команде"),
     ("leader_full_name", "Имя фамилия лидера"),
 ]
+EXCEL_CELL_MAX = 32767  # лимит символов в ячейке Excel
+
+
+def sanitize_excel_value(value):
+    """
+    Приводит значение к безопасному для openpyxl виду:
+    - None -> ""
+    - для строк: вычищает запрещённые символы, нормализует переносы строк,
+      и обрезает до лимита Excel (32767).
+    - для чисел/булевых оставляет как есть.
+    """
+    if value is None:
+        return ""
+
+    if isinstance(value, (int, float, bool)):
+        return value
+
+    text = str(value)
+    text = text.replace("\r\n", "\n").replace("\r", "\n")
+    text = ILLEGAL_CHARACTERS_RE.sub(" ", text)
+
+    if len(text) > EXCEL_CELL_MAX:
+        text = text[: EXCEL_CELL_MAX - 3] + "..."
+
+    return text
 
 
 def _leader_full_name(user):
diff --git a/partner_programs/views.py b/partner_programs/views.py
index e985ff1c..2783bb14 100644
--- a/partner_programs/views.py
+++ b/partner_programs/views.py
@@ -45,6 +45,7 @@
     BASE_COLUMNS,
     build_program_field_columns,
     row_dict_for_link,
+    sanitize_excel_value,
 )
 from partner_programs.utils import filter_program_projects_by_field_name
 from projects.models import Project
@@ -518,7 +519,9 @@ def get(self, request, pk: int):
                 extra_field_keys_order=extra_keys_order,
                 row_number=row_number,
             )
-            ws.append([row_dict.get(key, "") for key, _ in header_pairs])
+            raw_values = [row_dict.get(key, "") for key, _ in header_pairs]
+            safe_values = [sanitize_excel_value(v) for v in raw_values]
+            ws.append(safe_values)
 
         bio = io.BytesIO()
         wb.save(bio)