diff --git a/beacon_chain/sync/sync_manager.nim b/beacon_chain/sync/sync_manager.nim
index 64b0fe8b75..efbe2b334a 100644
--- a/beacon_chain/sync/sync_manager.nim
+++ b/beacon_chain/sync/sync_manager.nim
@@ -167,9 +167,9 @@ proc getBlocks*[A, B](man: SyncManager[A, B], peer: A,
   try:
     let res =
       if peer.useSyncV2():
-        await beaconBlocksByRange_v2(peer, req.slot, req.count, 1)
+        await beaconBlocksByRange_v2(peer, req.slot, req.count, 1'u64)
       else:
-        (await beaconBlocksByRange(peer, req.slot, req.count, 1)).map(
+        (await beaconBlocksByRange(peer, req.slot, req.count, 1'u64)).map(
           proc(blcks: seq[phase0.SignedBeaconBlock]): auto =
             blcks.mapIt(newClone(ForkedSignedBeaconBlock.init(it))))
 
diff --git a/beacon_chain/sync/sync_queue.nim b/beacon_chain/sync/sync_queue.nim
index 108eebd566..473f9fa69c 100644
--- a/beacon_chain/sync/sync_queue.nim
+++ b/beacon_chain/sync/sync_queue.nim
@@ -7,7 +7,7 @@
 
 {.push raises: [Defect].}
 
-import std/[options, heapqueue, tables, strutils, sequtils, math, algorithm]
+import std/[options, heapqueue, tables, strutils, sequtils, math]
 import stew/[results, base10], chronos, chronicles
 import
   ../spec/datatypes/[base, phase0, altair],
@@ -134,8 +134,8 @@ proc checkResponse*[T](req: SyncRequest[T],
       inc(dindex)
     else:
       return false
-    slot = slot + 1
-    rindex = rindex + 1'u64
+    slot += 1'u64
+    rindex += 1'u64
 
   if dindex == len(data):
     return true