diff --git a/migrations/versions/20241212_1543_f62898bb3315_uids_to_dims.py b/migrations/versions/20241212_1543_f62898bb3315_uids_to_dims.py
new file mode 100644
index 0000000..324eb61
--- /dev/null
+++ b/migrations/versions/20241212_1543_f62898bb3315_uids_to_dims.py
@@ -0,0 +1,56 @@
+"""uids_to_dims
+
+Revision ID: f62898bb3315
+Revises: 0d462525c992
+Create Date: 2024-12-12 15:43:14.642986
+
+"""
+
+from alembic import op
+import sqlalchemy as sa
+import os
+
+
+# revision identifiers, used by Alembic.
+revision = 'f62898bb3315'
+down_revision = '0d462525c992'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # alembic cannot do it properly, so you need to manually handle columns
+    # dim_event_act
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_event_act drop COLUMN IF EXISTS id')
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_event_act add COLUMN IF not EXISTS id UUID')
+    # dim_group_act
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_group_act drop COLUMN IF EXISTS id')
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_group_act add COLUMN IF not EXISTS id UUID')
+    # dim_lecturer_act
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_lecturer_act drop COLUMN IF EXISTS id')
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_lecturer_act add COLUMN IF not EXISTS id UUID')
+    # dim_room_act
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_room_act drop COLUMN IF EXISTS id')
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_room_act add COLUMN IF not EXISTS id UUID')
+    op.drop_column('ods_link_timetable_group', 'lesson_id', schema='ODS_TIMETABLE')
+
+
+def downgrade():
+    op.add_column(
+        'ods_link_timetable_group',
+        sa.Column('lesson_id', sa.INTEGER(), autoincrement=False, nullable=True),
+        schema='ODS_TIMETABLE',
+    )
+    # alembic cannot do it properly, so you need to manually handle columns
+    # dim_event_act
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_event_act drop COLUMN IF EXISTS id')
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_event_act add COLUMN IF not EXISTS id INTEGER')
+    # dim_group_act
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_group_act drop COLUMN IF EXISTS id')
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_group_act add COLUMN IF not EXISTS id INTEGER')
+    # dim_lecturer_act
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_lecturer_act drop COLUMN IF EXISTS id')
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_lecturer_act add COLUMN IF not EXISTS id INTEGER')
+    # dim_room_act
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_room_act drop COLUMN IF EXISTS id')
+    op.execute('ALTER TABLE "DM_TIMETABLE".dim_room_act add COLUMN IF not EXISTS id INTEGER')
\ No newline at end of file
diff --git a/profcomff_definitions/DM/timetable.py b/profcomff_definitions/DM/timetable.py
index d0ea023..bb020f3 100644
--- a/profcomff_definitions/DM/timetable.py
+++ b/profcomff_definitions/DM/timetable.py
@@ -1,10 +1,14 @@
+
+import uuid
+
+from sqlalchemy import UUID, String
 from sqlalchemy.orm import Mapped, mapped_column
 
 from profcomff_definitions.base import Base
 
 
 class DimRoomAct(Base):
-    id: Mapped[int] = mapped_column(primary_key=True)
+    id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True, default=uuid.uuid4)
     room_api_id: Mapped[int]
     room_name: Mapped[str | None]
     room_direction_text_type: Mapped[str | None]
@@ -13,7 +17,7 @@ class DimRoomAct(Base):
 
 
 class DimLecturerAct(Base):
-    id: Mapped[int] = mapped_column(primary_key=True)
+    id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True, default=uuid.uuid4)
     lecturer_api_id: Mapped[int]
     lecturer_first_name: Mapped[str | None]
     lecturer_middle_name: Mapped[str | None]
@@ -24,7 +28,7 @@ class DimLecturerAct(Base):
 
 
 class DimGroupAct(Base):
-    id: Mapped[int] = mapped_column(primary_key=True)
+    id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True, default=uuid.uuid4)
     group_api_id: Mapped[int]
     group_name_text: Mapped[str | None]
     group_number: Mapped[str | None]
@@ -32,7 +36,7 @@ class DimGroupAct(Base):
 
 
 class DimEventAct(Base):
-    id: Mapped[int] = mapped_column(primary_key=True)
+    id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True, default=uuid.uuid4)
     event_api_id: Mapped[int | None]
     event_name_text: Mapped[str | None]
     source_name: Mapped[str]