diff --git a/eth/p2p/kademlia.nim b/eth/p2p/kademlia.nim
index a0e53a8..edbf0ef 100644
--- a/eth/p2p/kademlia.nim
+++ b/eth/p2p/kademlia.nim
@@ -46,7 +46,7 @@ type
 const
   BUCKET_SIZE = 16
   BITS_PER_HOP = 8
-  REQUEST_TIMEOUT = 900                 # timeout of message round trips
+  REQUEST_TIMEOUT = chronos.milliseconds(900) # timeout of message round trips
   FIND_CONCURRENCY = 3                  # parallel find node lookups
   ID_SIZE = 256
 
@@ -419,7 +419,7 @@ proc resolve*(k: KademliaProtocol, id: NodeId): Future[Node] {.async.} =
 proc bootstrap*(k: KademliaProtocol, bootstrapNodes: seq[Node], retries = 0) {.async.} =
   ## Bond with bootstrap nodes and do initial lookup. Retry `retries` times
   ## in case of failure, or indefinitely if `retries` is 0.
-  var retryInterval = 2
+  var retryInterval = chronos.milliseconds(2)
   var numTries = 0
   if bootstrapNodes.len != 0:
     while true:
@@ -428,7 +428,7 @@ proc bootstrap*(k: KademliaProtocol, bootstrapNodes: seq[Node], retries = 0) {.a
         inc numTries
         if retries == 0 or numTries < retries:
           info "Failed to bond with bootstrap nodes, retrying"
-          retryInterval = min(10000, retryInterval * 2)
+          retryInterval = min(chronos.seconds(10), retryInterval * 2)
           await sleepAsync(retryInterval)
         else:
           info "Failed to bond with bootstrap nodes"