diff --git a/README-DEV.md b/README-DEV.md
index 3e07c17..b79df1d 100644
--- a/README-DEV.md
+++ b/README-DEV.md
@@ -23,3 +23,57 @@ Now it is possible to run queries against the system, for example:
 }
 ```
 Which will return a list of proposals for the instrument with the ID of 4.
+
+# Updating the example data
+
+The file `ymir_data_example.json` can be updated by running the following query and copying the data over:
+```
+query {
+  proposals(filter: { instrumentId: 4 }) {
+    totalCount
+    proposals {
+      primaryKey
+      title
+      proposalId
+      users {
+        firstname
+        lastname
+        organisation
+      }
+      proposer {
+        firstname
+        lastname
+        organisation
+      }
+      samples {
+        title
+        id
+        questionary {
+          steps {
+            fields {
+              value
+              dependencies {
+                dependencyNaturalKey
+                questionId
+              }
+              question {
+                question
+                naturalKey
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+The data has a leading `data` tag which needs to be removed along with the corresponding brackets.
+```
+{
+  "data": {               <--- this needs removing
+    "proposals": {
+      "totalCount": 19,
+      "proposals": [
+```