diff --git a/doc/source/changeset.rst b/doc/source/changeset.rst
index d65a326..8aa8307 100644
--- a/doc/source/changeset.rst
+++ b/doc/source/changeset.rst
@@ -189,30 +189,30 @@ The following rundowns are true for all constraints classes:
 
         cons = PrimaryKeyConstraint('id', 'num', table=self.table)
 
-	# Create the constraint
-	cons.create()
+        # Create the constraint
+        cons.create()
 
-	# Drop the constraint
-	cons.drop()
+        # Drop the constraint
+        cons.drop()
 
    You can also pass in :class:`~sqlalchemy.schema.Column` objects (and table
    argument can be left out):
 
    .. code-block:: python
 
-	cons = PrimaryKeyConstraint(col1, col2)
+        cons = PrimaryKeyConstraint(col1, col2)
 
 #. Some dialects support ``CASCADE`` option when dropping constraints:
 
     .. code-block:: python
 
-	cons = PrimaryKeyConstraint(col1, col2)
+        cons = PrimaryKeyConstraint(col1, col2)
 
-	# Create the constraint
-	cons.create()
+        # Create the constraint
+        cons.create()
 
-	# Drop the constraint
-	cons.drop(cascade=True)
+        # Drop the constraint
+        cons.drop(cascade=True)
 
 .. note::
     SQLAlchemy Migrate will try to guess the name of the constraints for
diff --git a/doc/source/versioning.rst b/doc/source/versioning.rst
index 821280b..7b30cd3 100644
--- a/doc/source/versioning.rst
+++ b/doc/source/versioning.rst
@@ -140,7 +140,7 @@ Our first change script will create a simple table
 
     account = Table(
         'account', meta,
-	Column('id', Integer, primary_key=True),
+        Column('id', Integer, primary_key=True),
         Column('login', String(40)),
         Column('passwd', String(40)),
     )