diff --git a/db/migrate/20180213183818_change_epp_sessions_user_id_to_not_null.rb b/db/migrate/20180213183818_change_epp_sessions_user_id_to_not_null.rb
new file mode 100644
index 000000000..fbe685b33
--- /dev/null
+++ b/db/migrate/20180213183818_change_epp_sessions_user_id_to_not_null.rb
@@ -0,0 +1,5 @@
+class ChangeEppSessionsUserIdToNotNull < ActiveRecord::Migration
+  def change
+    change_column_null :epp_sessions, :user_id, false
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index e743e42f6..449ec44f8 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -1053,7 +1053,7 @@ CREATE TABLE epp_sessions (
     session_id character varying NOT NULL,
     created_at timestamp without time zone,
     updated_at timestamp without time zone,
-    user_id integer
+    user_id integer NOT NULL
 );
 
 
@@ -5092,3 +5092,5 @@ INSERT INTO schema_migrations (version) VALUES ('20180212152810');
 
 INSERT INTO schema_migrations (version) VALUES ('20180212154731');
 
+INSERT INTO schema_migrations (version) VALUES ('20180213183818');
+