diff --git a/coverage2sql/db/models.py b/coverage2sql/db/models.py
index 1a850bf..f6f1bbb 100644
--- a/coverage2sql/db/models.py
+++ b/coverage2sql/db/models.py
@@ -54,5 +54,5 @@ class Coverage(BASE, CoverageBase):
     project_name = sa.Column(sa.String(256),
                              nullable=False)
     coverage_rate = sa.Column(sa.Float())
-    report_time = sa.Column(sa.DateTime(), default=datetime.datetime.now())
+    report_time = sa.Column(sa.DateTime(), default=datetime.datetime.utcnow())
     report_time_microsecond = sa.Column(sa.Integer(), default=0)
diff --git a/coverage2sql/migrations/versions/52dfb338f74e_add_coverages_table.py b/coverage2sql/migrations/versions/52dfb338f74e_add_coverages_table.py
index 7b35cfe..c58047c 100644
--- a/coverage2sql/migrations/versions/52dfb338f74e_add_coverages_table.py
+++ b/coverage2sql/migrations/versions/52dfb338f74e_add_coverages_table.py
@@ -25,6 +25,7 @@ def upgrade():
                     sa.Column('report_time_microsecond', sa.Integer(),
                               default=0),
                     mysql_engine='InnoDB')
+    op.create_index('ix_project_name', 'coverages', ['project_name'])
 
 
 def downgrade():