diff --git a/app/models/__init__.py b/app/models/__init__.py
index 0fee7bc48e..4a3328b32d 100644
--- a/app/models/__init__.py
+++ b/app/models/__init__.py
@@ -6,7 +6,7 @@ XXX version préliminaire ScoDoc8 #sco8 sans département
 
 CODE_STR_LEN = 16  # chaine pour les codes
 SHORT_STR_LEN = 32  # courtes chaine, eg acronymes
-APO_CODE_STR_LEN = 24  # nb de car max d'un code Apogée
+APO_CODE_STR_LEN = 512  # nb de car max d'un code Apogée (il peut y en avoir plusieurs)
 GROUPNAME_STR_LEN = 64
 
 from app.models.raw_sql_init import create_database_functions
diff --git a/app/scodoc/sco_edit_module.py b/app/scodoc/sco_edit_module.py
index 813320d534..25ec3d25f2 100644
--- a/app/scodoc/sco_edit_module.py
+++ b/app/scodoc/sco_edit_module.py
@@ -32,15 +32,15 @@ import flask
 from flask import url_for, render_template
 from flask import g, request
 from flask_login import current_user
+
+from app import log
+from app import models
 from app.models import APO_CODE_STR_LEN
-from app.models import Matiere, Module, UniteEns
+from app.models import Formation, Matiere, Module, UniteEns
 
 import app.scodoc.notesdb as ndb
 import app.scodoc.sco_utils as scu
 from app.scodoc.sco_utils import ModuleType
-from app import log
-from app import models
-from app.models import Formation
 from app.scodoc.TrivialFormulator import TrivialFormulator
 from app.scodoc.sco_permissions import Permission
 from app.scodoc.sco_exceptions import (
@@ -294,6 +294,7 @@ def module_create(matiere_id=None, module_type=None, semestre_id=None):
                 "title": "Code Apogée",
                 "size": 25,
                 "explanation": "(optionnel) code élément pédagogique Apogée ou liste de codes ELP séparés par des virgules",
+                "validator": lambda val, _: len(val) < APO_CODE_STR_LEN,
             },
         ),
         (
diff --git a/app/scodoc/sco_edit_ue.py b/app/scodoc/sco_edit_ue.py
index a52826b70a..c9a2da171a 100644
--- a/app/scodoc/sco_edit_ue.py
+++ b/app/scodoc/sco_edit_ue.py
@@ -1216,7 +1216,8 @@ def do_ue_edit(args, bypass_lock=False, dont_invalidate_cache=False):
 def edit_ue_set_code_apogee(id=None, value=None):
     "set UE code apogee"
     ue_id = id
-    value = value.strip("-_ \t")
+    value = value.strip("-_ \t")[:APO_CODE_STR_LEN]  # tronque
+
     log("edit_ue_set_code_apogee: ue_id=%s code_apogee=%s" % (ue_id, value))
 
     ues = ue_list(args={"ue_id": ue_id})
diff --git a/migrations/versions/28874ed6af64_augmente_taille_codes_apogee.py b/migrations/versions/28874ed6af64_augmente_taille_codes_apogee.py
new file mode 100644
index 0000000000..7ac8c8c365
--- /dev/null
+++ b/migrations/versions/28874ed6af64_augmente_taille_codes_apogee.py
@@ -0,0 +1,84 @@
+"""augmente taille codes Apogée
+
+Revision ID: 28874ed6af64
+Revises: f40fbaf5831c
+Create Date: 2022-01-19 22:57:59.678313
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = "28874ed6af64"
+down_revision = "f40fbaf5831c"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+
+    op.alter_column(
+        "notes_formsemestre_etapes",
+        "etape_apo",
+        existing_type=sa.VARCHAR(length=24),
+        type_=sa.String(length=512),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        "notes_formsemestre_inscription",
+        "etape",
+        existing_type=sa.VARCHAR(length=24),
+        type_=sa.String(length=512),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        "notes_modules",
+        "code_apogee",
+        existing_type=sa.VARCHAR(length=24),
+        type_=sa.String(length=512),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        "notes_ue",
+        "code_apogee",
+        existing_type=sa.VARCHAR(length=24),
+        type_=sa.String(length=512),
+        existing_nullable=True,
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column(
+        "notes_ue",
+        "code_apogee",
+        existing_type=sa.String(length=512),
+        type_=sa.VARCHAR(length=24),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        "notes_modules",
+        "code_apogee",
+        existing_type=sa.String(length=512),
+        type_=sa.VARCHAR(length=24),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        "notes_formsemestre_inscription",
+        "etape",
+        existing_type=sa.String(length=512),
+        type_=sa.VARCHAR(length=24),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        "notes_formsemestre_etapes",
+        "etape_apo",
+        existing_type=sa.String(length=512),
+        type_=sa.VARCHAR(length=24),
+        existing_nullable=True,
+    )
+
+    # ### end Alembic commands ###