diff --git a/fixtures/initial_data.json b/fixtures/initial_data.json
index 987be7622..a57e1deae 100644
--- a/fixtures/initial_data.json
+++ b/fixtures/initial_data.json
@@ -90,19 +90,10 @@
         "pk": 1,
         "fields": {
             "external_key": "tenant-x-key",
-            "lms_configs": {
-                "EDNX_USE_SIGNAL": true,
-                "PLATFORM_NAME": "Tenant X",
-                "SITE_NAME": "tenant-x.local.edly.io",
-                "course_org_filter": [
-                    "TenantX",
-                    "OpenedX",
-                    "edX"
-                ]
-            },
-            "studio_configs": {},
-            "theming_configs": {},
-            "meta": {},
+            "lms_configs": "{\"EDNX_USE_SIGNAL\": true,\"PLATFORM_NAME\": \"Tenant X\",\"SITE_NAME\": \"tenant-x.local.edly.io\",\"course_org_filter\": [\"TenantX\",\"OpenedX\",\"edx\"]}",
+            "studio_configs": "{}",
+            "theming_configs": "{}",
+            "meta": "{}",
             "organizations": [
                 1
             ]
@@ -113,17 +104,10 @@
         "pk": 2,
         "fields": {
             "external_key": "tenant-y-key",
-            "lms_configs": {
-                "EDNX_USE_SIGNAL": true,
-                "PLATFORM_NAME": "Tenant Y",
-                "SITE_NAME": "tenant-y.local.edly.io",
-                "course_org_filter": [
-                    "TenantY"
-                ]
-            },
-            "studio_configs": {},
-            "theming_configs": {},
-            "meta": {},
+            "lms_configs": "{\n \"EDNX_USE_SIGNAL\": true,\n \"PLATFORM_NAME\": \"Tenant Y\",\n \"SITE_NAME\": \"tenant-y.local.edly.io\",\n \"course_org_filter\": [\n \"TenantY\"\n ]\n}",
+            "studio_configs": "{}",
+            "theming_configs": "{}",
+            "meta": "{}",
             "organizations": [
                 2
             ]