diff --git a/alembic/versions/2450600b8eaf_add_project_contacts.py b/alembic/versions/2450600b8eaf_add_project_contacts.py
new file mode 100644
index 0000000..511d577
--- /dev/null
+++ b/alembic/versions/2450600b8eaf_add_project_contacts.py
@@ -0,0 +1,32 @@
+"""add project contacts
+
+Revision ID: 2450600b8eaf
+Revises: 9b42b5289e30
+Create Date: 2022-10-17 12:46:59.115251
+
+"""
+from alembic import op
+from sqlalchemy.sql import text
+
+
+# revision identifiers, used by Alembic.
+revision = '2450600b8eaf'
+down_revision = '9b42b5289e30'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    conn = op.get_bind()
+
+    add_contacts_query = "ALTER TABLE projects ADD COLUMN contacts varchar(50)"
+    conn.execute(text(add_contacts_query))
+
+
+def downgrade() -> None:
+    conn = op.get_bind()
+
+    drop_contacts_query = """
+    ALTER TABLE projects DROP COLUMN contacts
+    """
+    conn.execute(text(drop_contacts_query))
diff --git a/alembic/versions/9b42b5289e30_init_tables.py b/alembic/versions/9b42b5289e30_init_tables.py
index 7319c43..276dae8 100644
--- a/alembic/versions/9b42b5289e30_init_tables.py
+++ b/alembic/versions/9b42b5289e30_init_tables.py
@@ -6,7 +6,6 @@ Create Date: 2022-10-17 11:43:07.452838
 
 """
 from alembic import op
-import sqlalchemy as sa
 from sqlalchemy.sql import text
 
 
@@ -28,22 +27,6 @@ def upgrade() -> None:
     """
     conn.execute(text(init_users_query))
 
-    init_tags_query = """
-    CREATE TABLE tags (
-        id SERIAL PRIMARY KEY,
-        name varchar(100)
-    );
-    """
-    conn.execute(text(init_tags_query))
-
-    init_categories_query = """
-    CREATE TABLE categories (
-        id SERIAL PRIMARY KEY,
-        name varchar(20)
-    );
-    """
-    conn.execute(text(init_categories_query))
-
     init_projects_query = """
     CREATE TABLE projects (
         id SERIAL PRIMARY KEY,
@@ -52,8 +35,8 @@ def upgrade() -> None:
         creator bigint REFERENCES users,
         contributors smallint DEFAULT 1,
         status bit(1) DEFAULT B'1',
-        tag int REFERENCES tags,
-        category int REFERENCES categories,
+        tag varchar(50) UNIQUE,
+        category varchar(50) UNIQUE,
         creation_date date DEFAULT CURRENT_DATE
     );
     """
@@ -64,5 +47,5 @@ def downgrade() -> None:
     conn = op.get_bind()
 
     conn.execute(text(
-        "DROP TABLE users, tags, categories, projects CASCADE"
+        "DROP TABLE users, projects CASCADE"
     ))