diff --git a/aurweb/models/package_comment.py b/aurweb/models/package_comment.py
index ffe1300b..a511df9b 100644
--- a/aurweb/models/package_comment.py
+++ b/aurweb/models/package_comment.py
@@ -17,7 +17,7 @@ class PackageComment(Base):
         nullable=False)
     PackageBase = relationship(
         _PackageBase, backref=backref("comments", lazy="dynamic",
-                                      cascade="all,delete"),
+                                      cascade="all, delete"),
         foreign_keys=[PackageBaseID])
 
     UsersID = Column(Integer, ForeignKey("Users.ID", ondelete="SET NULL"))
diff --git a/aurweb/models/package_dependency.py b/aurweb/models/package_dependency.py
index df6cc6cf..3f4e2baa 100644
--- a/aurweb/models/package_dependency.py
+++ b/aurweb/models/package_dependency.py
@@ -15,7 +15,7 @@ class PackageDependency(Base):
         nullable=False)
     Package = relationship(
         _Package, backref=backref("package_dependencies", lazy="dynamic",
-                                  cascade="all,delete"),
+                                  cascade="all, delete"),
         foreign_keys=[PackageID])
 
     DepTypeID = Column(
diff --git a/aurweb/models/package_relation.py b/aurweb/models/package_relation.py
index a8b495e2..e79a90d6 100644
--- a/aurweb/models/package_relation.py
+++ b/aurweb/models/package_relation.py
@@ -15,7 +15,7 @@ class PackageRelation(Base):
         nullable=False)
     Package = relationship(
         _Package, backref=backref("package_relations", lazy="dynamic",
-                                  cascade="all,delete"),
+                                  cascade="all, delete"),
         foreign_keys=[PackageID])
 
     RelTypeID = Column(
diff --git a/aurweb/models/package_source.py b/aurweb/models/package_source.py
index edb54f63..db983272 100644
--- a/aurweb/models/package_source.py
+++ b/aurweb/models/package_source.py
@@ -13,7 +13,7 @@ class PackageSource(Base):
                        nullable=False)
     Package = relationship(
         _Package, backref=backref("package_sources", lazy="dynamic",
-                                  cascade="all,delete"),
+                                  cascade="all, delete"),
         foreign_keys=[PackageID])
 
     __mapper_args__ = {"primary_key": [PackageID]}