diff --git a/lti_consumer/migrations/0009_backfill-empty-string-config-id.py b/lti_consumer/migrations/0009_backfill-empty-string-config-id.py
index 30f6a9ea..fbc5b85e 100644
--- a/lti_consumer/migrations/0009_backfill-empty-string-config-id.py
+++ b/lti_consumer/migrations/0009_backfill-empty-string-config-id.py
@@ -27,7 +27,7 @@
 FROM
     lti_consumer_lticonfiguration
 WHERE
-    config_id = ""
+    config_id = '00000000-0000-0000-0000-000000000000'
 ;\
 """
 
diff --git a/lti_consumer/migrations/0010_backfill-empty-string-lti-config.py b/lti_consumer/migrations/0010_backfill-empty-string-lti-config.py
index a3773d74..63aa397a 100644
--- a/lti_consumer/migrations/0010_backfill-empty-string-lti-config.py
+++ b/lti_consumer/migrations/0010_backfill-empty-string-lti-config.py
@@ -27,7 +27,7 @@
 FROM
     lti_consumer_lticonfiguration
 WHERE
-    lti_config = ""
+    lti_config = ''
 ;\
 """