diff --git a/.gitignore b/.gitignore
index d532c87..c0a9379 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,9 @@ venv/
 # Logs
 logs/
 
+# Calendars
+calendars/
+
 # Bot private
 edt
 edt.*
@@ -12,3 +15,6 @@ token.ini
 
 # PyCharm
 .idea/
+
+# Alembic
+alembic*
diff --git a/update.py b/update.py
deleted file mode 100644
index cc39708..0000000
--- a/update.py
+++ /dev/null
@@ -1,9 +0,0 @@
-import shelve
-from base import User
-
-with shelve.open("edt", writeback=True) as db:
-    for u in db:
-        nu = User(0, None)
-        for v in db[u].__dict__:
-            setattr(nu, v, db[u].__dict__[v])
-        db[u] = nu
diff --git a/update.sh b/update.sh
new file mode 100755
index 0000000..b6b25de
--- /dev/null
+++ b/update.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+if [ -f edt.db ]; then
+  if [ ! -d alembic ]; then
+    alembic init alembic
+    sed -i '/sqlalchemy.url/s/= .*/= sqlite:\/\/\/edt.db/' alembic.ini
+    sed -i "/target_metadata = None/s/target_metadata.*/import os, sys\nsys.path.append(os.getcwd())\nfrom base import Base\ntarget_metadata = Base.metadata/" alembic/env.py
+  fi
+
+  alembic revision --autogenerate -m "Auto upgrade"
+  alembic upgrade head
+else
+  echo "No database !"
+fi