diff --git a/meals/db.py b/meals/db.py
index fe777e1..55a5f32 100644
--- a/meals/db.py
+++ b/meals/db.py
@@ -37,8 +37,8 @@ async def create(conn):
             id INTEGER PRIMARY KEY,
             suggested_date DATETIME,
             consumed_date DATETIME DEFAULT NULL,
-            deleted_date TEXT DEFAULT NULL,
-            purchase_date TEXT DEFAULT NULL
+            deleted_date DATETIME DEFAULT NULL,
+            purchase_date DATETIME DEFAULT NULL
         );''')
     
     await conn.execute('''
diff --git a/shopping/db.py b/shopping/db.py
index b71299a..2a7163a 100644
--- a/shopping/db.py
+++ b/shopping/db.py
@@ -54,8 +54,8 @@ async def create(conn):
     await conn.execute('''
         CREATE TABLE IF NOT EXISTS ShoppingList (
             id INTEGER PRIMARY KEY,
-            created_date DATETIME,
-            store_name TEXT
+            created_date DATETIME NOT NULL,
+            store_name TEXT NOT NULL,
         );''')
 
     await conn.execute('''
@@ -65,7 +65,7 @@ async def create(conn):
             list_id INTEGER,
             person_id INTEGER,
             meal_id INTEGER,
-            created_date TEXT,
+            created_date DATETIME NOT NULL,
             FOREIGN KEY(ingredient_id) REFERENCES Ingredient(id),
             FOREIGN KEY(person_id) REFERENCES Person(id),
             FOREIGN KEY(meal_id) REFERENCES Meal(id),