diff --git a/ukaea-schema/facility/mrf/mrf.schema.json b/ukaea-schema/facility/mrf/mrf.schema.json
index 12b3263..182b13d 100644
--- a/ukaea-schema/facility/mrf/mrf.schema.json
+++ b/ukaea-schema/facility/mrf/mrf.schema.json
@@ -9,23 +9,23 @@
             "example": "MRF",
             "default": "MRF"
         },
-        "SEID": {
+        "seid": {
             "type": "string",
             "pattern": "^//d{4}$",
             "example": "0001"
         },
-        "jobID": {
+        "jobId": {
             "type": "string",
             "pattern": "^\\d{5}$",
             "example": "23001",
             "$comment": "First 2 digits represent year, last 3 digits represent incremental number"
         },
-        "sessionID": {
+        "sessionId": {
             "type": "string",
             "example": "1",
             "$comment": "Incremental session ID across a single job, not yet implemented in Booking System"
         },
-        "sampleID": {
+        "sampleId": {
             "type": "string",
             "example": "S-0001370",
             "$comment": "Unique identifier for the sample, not part of Salesforce MVP"