diff --git a/VERSION b/VERSION
index 197c4d5..005119b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.4.0
+2.4.1
diff --git a/api/query.proto b/api/query.proto
index 0e55a56..737eacc 100644
--- a/api/query.proto
+++ b/api/query.proto
@@ -14,6 +14,7 @@ message SampleQuery {
 
 message ImpedanceQuery {
   repeated uint32 electrode_ids = 1;
+  uint32 peripheral_id = 2;
 }
 
 message SelfTestQuery {