diff --git a/requirements.txt b/requirements.txt
index 6327ef9d51..daed34e613 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,6 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
 pbr>=0.6,!=0.7,<1.0
 SQLAlchemy>=0.8.4,<=0.8.99,>=0.9.7,<=0.9.99
 alembic>=0.6.4
@@ -9,7 +12,7 @@ lockfile>=0.8
 lxml>=2.3
 WebOb>=1.2.3
 greenlet>=0.3.2
-sqlalchemy-migrate>=0.9.1
+sqlalchemy-migrate>=0.9.1,!=0.9.2
 netaddr>=0.7.12
 paramiko>=1.13.0
 iso8601>=0.1.9
diff --git a/test-requirements.txt b/test-requirements.txt
index ec4e1f381e..4f6d8fdcd9 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,3 +1,6 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
 hacking>=0.8.0,<0.9
 coverage>=3.6
 discover