diff --git a/TODO.md b/TODO.md
index b538191..b96a404 100644
--- a/TODO.md
+++ b/TODO.md
@@ -2,5 +2,6 @@
 
 ## Fixes
 - [x] Fix CSV import UNIQUE constraint crash: skip rows whose identifier already exists in DB
+- [x] Auto-migrate both test.db and posterg.db on `just serve` via scripts/migrate.sh
 - [x] Fix wrong `require_once` depth in `public/admin/actions/page.php` (`../../` → `../../../`)
 - [x] Fix same path depth bug in `formulaire.php` and `publish.php`
diff --git a/justfile b/justfile
index 4f7c4bd..10e1488 100644
--- a/justfile
+++ b/justfile
@@ -12,7 +12,7 @@ setup:
     @bash scripts/setup-dev.sh
 
 [group('dev')]
-serve:
+serve: migrate
     @php -S 127.0.0.1:8000 -t public/
 
 [group('dev')]
@@ -110,6 +110,19 @@ syntax:
 # Database
 # ============================================================================
 
+[group('database')]
+migrate:
+    @echo "Running migrations…"
+    @bash scripts/migrate.sh both
+
+[group('database')]
+migrate-test:
+    @bash scripts/migrate.sh test
+
+[group('database')]
+migrate-prod:
+    @bash scripts/migrate.sh prod
+
 [group('database')]
 init-db:
     @sqlite3 storage/test.db < storage/schema.sql
diff --git a/scripts/migrate.sh b/scripts/migrate.sh
new file mode 100755
index 0000000..fe2c4b6
--- /dev/null
+++ b/scripts/migrate.sh
@@ -0,0 +1,124 @@
+#!/usr/bin/env bash
+# Apply pending SQL migrations to one or both SQLite databases.
+# Usage:
+#   scripts/migrate.sh              # migrates both test.db and posterg.db
+#   scripts/migrate.sh test         # migrates storage/test.db only
+#   scripts/migrate.sh prod         # migrates storage/posterg.db only
+
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+MIGRATIONS_DIR="$REPO_ROOT/storage/migrations"
+TEST_DB="$REPO_ROOT/storage/test.db"
+PROD_DB="$REPO_ROOT/storage/posterg.db"
+
+# ---------------------------------------------------------------------------
+# Check whether a migration's effects are already present in the DB so that
+# legacy databases (created before the migrations table existed) can be
+# bootstrapped correctly without re-running non-idempotent SQL.
+# ---------------------------------------------------------------------------
+already_applied_structurally() {
+    local db="$1"
+    local name="$2"
+
+    case "$name" in
+        001_rename_keywords_to_tags.sql)
+            # Effect: table 'tags' and 'thesis_tags' exist
+            count=$(sqlite3 "$db" "SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name IN ('tags','thesis_tags');")
+            [ "$count" -eq 2 ]
+            ;;
+        002_add_visibility.sql)
+            # Effect: access_types seed rows (always safe to re-run with OR IGNORE, but mark done if rows exist)
+            count=$(sqlite3 "$db" "SELECT COUNT(*) FROM access_types WHERE id IN (1,2,3);" 2>/dev/null || echo 0)
+            [ "$count" -eq 3 ]
+            ;;
+        003_seed_license_types.sql)
+            # Effect: at least one row in license_types
+            count=$(sqlite3 "$db" "SELECT COUNT(*) FROM license_types;" 2>/dev/null || echo 0)
+            [ "$count" -gt 0 ]
+            ;;
+        004_jury_roles.sql)
+            # Effect: 'role' column on thesis_supervisors
+            count=$(sqlite3 "$db" "SELECT COUNT(*) FROM pragma_table_info('thesis_supervisors') WHERE name='role';")
+            [ "$count" -eq 1 ]
+            ;;
+        005_add_banner.sql)
+            # Effect: 'banner_path' column on theses
+            count=$(sqlite3 "$db" "SELECT COUNT(*) FROM pragma_table_info('theses') WHERE name='banner_path';")
+            [ "$count" -eq 1 ]
+            ;;
+        006_add_composite_index.sql)
+            # Effect: index idx_theses_pub_year exists (CREATE INDEX IF NOT EXISTS — safe to re-run anyway)
+            count=$(sqlite3 "$db" "SELECT COUNT(*) FROM sqlite_master WHERE type='index' AND name='idx_theses_pub_year';")
+            [ "$count" -eq 1 ]
+            ;;
+        *)
+            # Unknown migration — assume not applied
+            return 1
+            ;;
+    esac
+}
+
+migrate_db() {
+    local db="$1"
+    local label="$2"
+
+    if [ ! -f "$db" ]; then
+        echo "  [$label] database not found, skipping: $db"
+        return
+    fi
+
+    # Ensure tracking table exists
+    sqlite3 "$db" "CREATE TABLE IF NOT EXISTS schema_migrations (
+        name TEXT PRIMARY KEY,
+        applied_at TEXT NOT NULL DEFAULT (datetime('now'))
+    );"
+
+    local applied=0
+    local seeded=0
+    local skipped=0
+
+    for migration in "$MIGRATIONS_DIR"/*.sql; do
+        name="$(basename "$migration")"
+        already=$(sqlite3 "$db" "SELECT COUNT(*) FROM schema_migrations WHERE name='$name';")
+
+        if [ "$already" -eq 1 ]; then
+            skipped=$((skipped + 1))
+            continue
+        fi
+
+        # Not in tracking table — check if it was already applied before we started tracking
+        if already_applied_structurally "$db" "$name"; then
+            sqlite3 "$db" "INSERT OR IGNORE INTO schema_migrations (name) VALUES ('$name');"
+            seeded=$((seeded + 1))
+            echo "  [$label] seeded  $name (already applied)"
+            continue
+        fi
+
+        echo "  [$label] applying $name …"
+        if sqlite3 "$db" < "$migration"; then
+            sqlite3 "$db" "INSERT OR IGNORE INTO schema_migrations (name) VALUES ('$name');"
+            applied=$((applied + 1))
+        else
+            echo "  [$label] ERROR applying $name — aborting" >&2
+            exit 1
+        fi
+    done
+
+    echo "  [$label] done — $applied applied, $seeded seeded, $skipped already up-to-date"
+}
+
+TARGET="${1:-both}"
+
+case "$TARGET" in
+    test)  migrate_db "$TEST_DB"  "test.db"    ;;
+    prod)  migrate_db "$PROD_DB"  "posterg.db" ;;
+    both)
+        migrate_db "$TEST_DB"  "test.db"
+        migrate_db "$PROD_DB"  "posterg.db"
+        ;;
+    *)
+        echo "Usage: $0 [test|prod|both]" >&2
+        exit 1
+        ;;
+esac
diff --git a/storage/posterg.db b/storage/posterg.db
index 6c54dad..d1e8816 100644
Binary files a/storage/posterg.db and b/storage/posterg.db differ
diff --git a/storage/test.db b/storage/test.db
index fb97dda..a5901c5 100644
Binary files a/storage/test.db and b/storage/test.db differ