diff --git a/brain.proto b/brain.proto
index 05d8e4e..62224e3 100644
--- a/brain.proto
+++ b/brain.proto
@@ -40,6 +40,23 @@ message NewVMRequest {
   string dtrfs_sha = 14;
 }
 
+message UpdateVMRequest {
+  string uuid = 1;
+  uint32 disk_size_gb = 2;
+  uint32 vcpus = 3;
+  uint32 memory_mb = 4;
+  string kernel_url = 5;
+  string kernel_sha = 6;
+  string dtrfs_url = 7;
+  string dtrfs_sha = 8;
+}
+
+message UpdateVMResp {
+  string uuid = 1;
+  string timestamp = 2;
+  string error = 3;
+}
+
 message VMContract {
   string uuid = 1;
   string hostname = 2;
@@ -79,6 +96,7 @@ service BrainDaemonService {
   rpc SendVMConfirmations (stream NewVMConfirmation) returns (Empty);
   rpc DeletedVMUpdates (NodePubkey) returns (stream DeletedVMUpdate);
   rpc ListVMContracts (ListVMContractsReq) returns (stream VMContract);
+  rpc UpdateVMs (NodePubkey) returns (stream UpdateVMRequest);
 }
 
 message NodeFilters {
@@ -105,5 +123,5 @@ service BrainCliService {
   rpc ListVMContracts (ListVMContractsReq) returns (stream VMContract);
   rpc ListNodes (NodeFilters) returns (stream NodeListResp);
   rpc DeleteVM (DeletedVMUpdate) returns (Empty);
-}
-
+  rpc UpdateVM (UpdateVMRequest) returns (UpdateVMResp);
+}
\ No newline at end of file
diff --git a/src/data.rs b/src/data.rs
index 639fdd1..624e707 100644
--- a/src/data.rs
+++ b/src/data.rs
@@ -1,10 +1,10 @@
 #![allow(dead_code)]
-use crate::grpc::brain as grpc;
+use crate::grpc::brain::{self as grpc, UpdateVmRequest, UpdateVmResp};
 use dashmap::DashMap;
 use log::{debug, info, warn};
 use std::sync::RwLock;
 use tokio::sync::mpsc::Sender;
-use tokio::sync::oneshot::Sender as OneshotSender;
+use tokio::sync::oneshot::{self, Sender as OneshotSender};
 
 #[derive(Eq, Hash, PartialEq, Clone)]
 pub struct Node {
@@ -98,6 +98,7 @@ pub struct BrainData {
     tmp_vmrequests: DashMap<String, (grpc::NewVmRequest, OneshotSender<grpc::NewVmConfirmation>)>,
     daemon_deletevm_tx: DashMap<String, Sender<grpc::DeletedVmUpdate>>,
     daemon_newvm_tx: DashMap<String, Sender<grpc::NewVmRequest>>,
+    daemon_updatevm_tx: DashMap<String, Sender<grpc::UpdateVmRequest>>,
 }
 
 #[derive(Debug)]
@@ -115,6 +116,7 @@ impl BrainData {
             tmp_vmrequests: DashMap::new(),
             daemon_deletevm_tx: DashMap::new(),
             daemon_newvm_tx: DashMap::new(),
+            daemon_updatevm_tx: DashMap::new(),
         }
     }
 
diff --git a/src/grpc.rs b/src/grpc.rs
index 72d2f69..fe51c9e 100644
--- a/src/grpc.rs
+++ b/src/grpc.rs
@@ -159,6 +159,29 @@ impl BrainDaemonService for BrainDaemonMock {
             Box::pin(output_stream) as Self::ListVMContractsStream
         ))
     }
+
+    type UpdateVMsStream = Pin<Box<dyn Stream<Item = Result<UpdateVmRequest, Status>> + Send>>;
+
+    async fn update_v_ms(
+        &self,
+        req: Request<NodePubkey>,
+    ) -> Result<Response<Self::UpdateVMsStream>, Status> {
+        let node_pubkey = req.into_inner().node_pubkey;
+        let (grpc_tx, grpc_rx) = mpsc::channel(6);
+        let (_, mut data_rx) = mpsc::channel(6);
+
+        tokio::spawn(async move {
+            while let Some(update_req) = data_rx.recv().await {
+                if let Err(e) = grpc_tx.send(Ok(update_req)).await {
+                    warn!("Could not send UpdateVmRequest to {node_pubkey}: {e:?}");
+                    break;
+                }
+            }
+        });
+
+        let output_stream = ReceiverStream::new(grpc_rx);
+        Ok(Response::new(Box::pin(output_stream) as Self::UpdateVMsStream))
+    }
 }
 
 #[tonic::async_trait]
@@ -232,4 +255,24 @@ impl BrainCliService for BrainCliMock {
         self.data.delete_vm(req).await;
         Ok(Response::new(Empty {}))
     }
+
+    async fn update_vm(
+        &self,
+        req: Request<UpdateVmRequest>,
+    ) -> Result<Response<UpdateVmResp>, Status> {
+        let req = req.into_inner();
+        info!("CLI requested UpdateVM: {req:?}");
+        let (oneshot_tx, oneshot_rx) = tokio::sync::oneshot::channel();
+        self.data.submit_updatevmrequest(req, oneshot_tx).await;
+        match oneshot_rx.await {
+            Ok(resp) => {
+                info!("Returning UpdateVmResp: {resp:?}");
+                Ok(Response::new(resp))
+            },
+            Err(e) => {
+                log::error!("Error waiting for UpdateVmResp: {e:?}");
+                Err(Status::unknown("Daemon not responding."))
+            }
+        }
+    }
 }