diff --git a/yadc/models.py b/yadc/models.py
index 1bccf03..38aa395 100644
--- a/yadc/models.py
+++ b/yadc/models.py
@@ -56,8 +56,8 @@ class TAG_CATEGORY(enum.Enum):
 #     deleted = 2
 
 class TimestampMixin(object):
-    created = db.Column(UtcDateTime, nullable=False, default=utcnow())
-    updated = db.Column(UtcDateTime, nullable=False, onupdate=utcnow(), default=utcnow())
+    created = db.Column(UtcDateTime, nullable=False, server_default=utcnow())
+    updated = db.Column(UtcDateTime, nullable=False, onupdate=utcnow(), server_default=utcnow())
 
     def natural_created(self):
         return humanize.naturaltime(datetime.now().astimezone(self.created.tzinfo) - self.created)
@@ -70,8 +70,8 @@ class User(UserMixin, TimestampMixin, db.Model):
     username = db.Column(db.String(128), unique=True, nullable=False)
     email = db.Column(db.String(256), unique=True)
     pass_hash = db.Column(db.String(128))
-    op_level = db.Column(db.Enum(OP_LEVEL), default=OP_LEVEL.user, nullable=False)
-    user_status = db.Column(db.Enum(USER_STATUS), default=USER_STATUS.active, nullable=False)
+    op_level = db.Column(db.Enum(OP_LEVEL), server_default=OP_LEVEL.user, nullable=False)
+    user_status = db.Column(db.Enum(USER_STATUS), server_default=USER_STATUS.active, nullable=False)
     last_login = db.Column(UtcDateTime)
 
     ban_status = None
@@ -130,11 +130,11 @@ class Post(TimestampMixin, db.Model):
     md5 = db.Column(db.String(32), unique=True, nullable=False)
     filetype = db.Column(db.Enum(FILETYPE), nullable=False)
     rating = db.Column(db.Enum(RATING), nullable=False)
-    status = db.Column(db.Enum(POST_STATUS), default=POST_STATUS.pending, nullable=False)
+    status = db.Column(db.Enum(POST_STATUS), server_default=POST_STATUS.pending, nullable=False)
 
-    width = db.Column(db.Integer, default=0)
-    height = db.Column(db.Integer, default=0)
-    filesize = db.Column(db.Integer, default=0)
+    width = db.Column(db.Integer, server_default=0)
+    height = db.Column(db.Integer, server_default=0)
+    filesize = db.Column(db.Integer, server_default=0)
 
     source = db.Column(db.String(2048))
     origin_filename = db.Column(db.String(255))
@@ -227,7 +227,7 @@ class Post(TimestampMixin, db.Model):
 class Tag(TimestampMixin, db.Model):
     id = db.Column(db.Integer, primary_key=True)
     content = db.Column(db.String(128), unique=True, nullable=False)
-    category = db.Column(db.Enum(TAG_CATEGORY), default=TAG_CATEGORY.general)
+    category = db.Column(db.Enum(TAG_CATEGORY), server_default=TAG_CATEGORY.general)
 
     #posts = db.relationship('Post', secondary=post_tags, back_populates='tags')
 
@@ -243,7 +243,7 @@ class Comment(TimestampMixin, db.Model):
     content = db.Column(db.String(512), nullable=False)
 
     # status = db.Column(db.Enum(COMMENT_STATUS), default=COMMENT_STATUS.visible)
-    deleted = db.Column(db.Boolean, default=False)
+    deleted = db.Column(db.Boolean, server_default=False)
     delete_reason = db.Column(db.String(512))
 
     post_id = db.Column(db.Integer, db.ForeignKey('post.id'))