diff --git a/rpc/build.gradle b/rpc/build.gradle
index 9b0ba0aae..08db4dff7 100644
--- a/rpc/build.gradle
+++ b/rpc/build.gradle
@@ -10,7 +10,7 @@ dependencies {
     implementation "org.reflections:reflections:${versions.reflections}"
     implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:${versions.serialization}"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:${versions.coroutines}"
-    implementation "com.networknt:json-schema-validator:1.0.67"
+    implementation "com.networknt:json-schema-validator:1.5.2"
     implementation "commons-io:commons-io:${versions.apacheCommons}"
 
     def generateForProjects = coreModules + commonModule
diff --git a/rpc/schemas/common/devices/PrimaryDeviceConfiguration.json b/rpc/schemas/common/devices/PrimaryDeviceConfiguration.json
index ef4de9950..34f116f14 100644
--- a/rpc/schemas/common/devices/PrimaryDeviceConfiguration.json
+++ b/rpc/schemas/common/devices/PrimaryDeviceConfiguration.json
@@ -12,11 +12,15 @@
     }
   ],
   "$defs": {
+    "HACK-SEE-ISSUE-492": true,
     "PrimaryDeviceConfiguration": {
       "$anchor": "PrimaryDeviceConfiguration",
       "allOf": [ { "$ref": "DeviceConfiguration.json#DeviceConfiguration" } ],
       "properties": {
-        "isPrimaryDevice": { "const": true }
+        "isPrimaryDevice": { "const": true },
+
+        "roleName": { "$ref": "#/$defs/HACK-SEE-ISSUE-492" },
+        "defaultSamplingConfiguration": { "$ref": "#/$defs/HACK-SEE-ISSUE-492" }
       },
       "required": [ "isPrimaryDevice" ]
     }
diff --git a/rpc/schemas/studies/users/ParticipantGroupStatus.json b/rpc/schemas/studies/users/ParticipantGroupStatus.json
index 6b77ff620..63f8ee772 100644
--- a/rpc/schemas/studies/users/ParticipantGroupStatus.json
+++ b/rpc/schemas/studies/users/ParticipantGroupStatus.json
@@ -7,6 +7,7 @@
     { "$ref": "#/$defs/Stopped" }
   ],
   "$defs": {
+    "HACK-SEE-ISSUE-492": true,
     "ParticipantGroupStatus": {
       "type": "object",
       "properties": {
@@ -23,7 +24,10 @@
       "allOf": [ { "$ref": "#/$defs/ParticipantGroupStatus" } ],
       "properties": {
         "invitedOn": { "type": "string", "format": "date-time" },
-        "studyDeploymentStatus": { "$ref": "../../deployments/StudyDeploymentStatus.json" }
+        "studyDeploymentStatus": { "$ref": "../../deployments/StudyDeploymentStatus.json" },
+
+        "id": { "$ref": "#/$defs/HACK-SEE-ISSUE-492" },
+        "participants": { "$ref": "#/$defs/HACK-SEE-ISSUE-492" }
       },
       "required": [ "invitedOn", "studyDeploymentStatus" ]
     },
diff --git a/rpc/src/test/kotlin/dk/cachet/carp/rpc/JsonSchemasTest.kt b/rpc/src/test/kotlin/dk/cachet/carp/rpc/JsonSchemasTest.kt
index 17b4c4947..a3dd470ed 100644
--- a/rpc/src/test/kotlin/dk/cachet/carp/rpc/JsonSchemasTest.kt
+++ b/rpc/src/test/kotlin/dk/cachet/carp/rpc/JsonSchemasTest.kt
@@ -35,20 +35,20 @@ class JsonSchemasTest
                 val requestErrors = requestSchema.validate( requestJson )
                 check( requestErrors.isEmpty() )
                 {
-                    "JSON schema \"${requestSchema.currentUri}\" " +
+                    "JSON schema \"${requestSchema.schemaLocation}\" " +
                     "doesn't match generated JSON example of \"${r.requestObject.klass}\": $requestErrors"
                 }
 
                 // Validate response.
                 val requestObjectName = r.requestObject.klass.simpleName
                 val responseSchemaNode = requestSchema.getRefSchemaNode( "#/\$defs/$requestObjectName/Response" )
-                val responseSchema = schemaFactory.getSchema( requestSchema.currentUri, responseSchemaNode )
+                val responseSchema = schemaFactory.getSchema( requestSchema.schemaLocation, responseSchemaNode )
                 val responseJson = mapper.readTree( r.response.json )
                 val responseErrors = responseSchema.validate( responseJson )
                 check( responseErrors.isEmpty() )
                 {
-                    "JSON schema response defined in \"${requestSchema.currentUri}\" for \"$requestObjectName\" " +
-                    "doesn't match generated JSON example of \"${r.response.klass}\": $responseErrors"
+                    "JSON schema response defined in \"${requestSchema.schemaLocation}\" for \"$requestObjectName\" " +
+                    "doesn't match generated JSON example of \"${r.response.klass.simpleName}\": $responseErrors"
                 }
             }
         }