diff --git a/beacon_chain/eth1/eth1_monitor.nim b/beacon_chain/eth1/eth1_monitor.nim
index b84758d5c..b74cc0c72 100644
--- a/beacon_chain/eth1/eth1_monitor.nim
+++ b/beacon_chain/eth1/eth1_monitor.nim
@@ -407,7 +407,8 @@ template awaitWithRetries*[T](lazyFutExpr: Future[T],
     if not f.finished:
       await cancelAndWait(f)
     elif f.failed:
-      static: doAssert f.error of CatchableError
+      when not (f.error of CatchableError):
+        static: doAssert false, "f.error not CatchableError"
       debug "Web3 request failed", req = reqType, err = f.error.msg
       inc failed_web3_requests
     else:
diff --git a/beacon_chain/rpc/rest_config_api.nim b/beacon_chain/rpc/rest_config_api.nim
index 94f71d392..73b29f7ad 100644
--- a/beacon_chain/rpc/rest_config_api.nim
+++ b/beacon_chain/rpc/rest_config_api.nim
@@ -6,7 +6,6 @@
 
 import stew/[byteutils, base10], chronicles
 import ".."/beacon_node,
-       ".."/eth1/eth1_monitor,
        ".."/spec/forks,
        "."/rest_utils
 from ../fork_choice/proto_array import PROPOSER_SCORE_BOOST
diff --git a/beacon_chain/rpc/rest_debug_api.nim b/beacon_chain/rpc/rest_debug_api.nim
index 86e819ec8..d7175c307 100644
--- a/beacon_chain/rpc/rest_debug_api.nim
+++ b/beacon_chain/rpc/rest_debug_api.nim
@@ -7,7 +7,7 @@
 
 import std/sequtils
 import chronicles
-import ".."/[version, beacon_node],
+import ".."/beacon_node,
        ".."/spec/forks,
        "."/[rest_utils, state_ttl_cache]
 
diff --git a/beacon_chain/rpc/rest_key_management_api.nim b/beacon_chain/rpc/rest_key_management_api.nim
index 5427adec3..fe67cced5 100644
--- a/beacon_chain/rpc/rest_key_management_api.nim
+++ b/beacon_chain/rpc/rest_key_management_api.nim
@@ -8,7 +8,7 @@ import std/[tables, os, strutils, uri]
 import chronos, chronicles, confutils,
        stew/[base10, results, io2], blscurve
 import ".."/validators/slashing_protection
-import ".."/[conf, version, filepath, beacon_node]
+import ".."/[conf, filepath, beacon_node]
 import ".."/spec/[keystore, crypto]
 import ".."/rpc/rest_utils
 import ".."/validators/[keystore_management, validator_pool, validator_duties]
diff --git a/beacon_chain/spec/eth2_apis/eth2_rest_serialization.nim b/beacon_chain/spec/eth2_apis/eth2_rest_serialization.nim
index 67d64b867..fd0b94853 100644
--- a/beacon_chain/spec/eth2_apis/eth2_rest_serialization.nim
+++ b/beacon_chain/spec/eth2_apis/eth2_rest_serialization.nim
@@ -145,7 +145,7 @@ proc readValue*(reader: var JsonReader[RestJson],
 
   for e in reader.readArray(string):
     let parsed = try:
-      parseBiggestUint(e)
+      parseBiggestUInt(e)
     except ValueError as err:
       reader.raiseUnexpectedValue("A string-encoded 8-bit usigned integer value expected")
 
diff --git a/beacon_chain/trusted_node_sync.nim b/beacon_chain/trusted_node_sync.nim
index 08d9e4bf6..27fd4cf9c 100644
--- a/beacon_chain/trusted_node_sync.nim
+++ b/beacon_chain/trusted_node_sync.nim
@@ -7,7 +7,7 @@
 {.push raises: [Defect].}
 
 import
-  stew/[assign2, base10],
+  stew/base10,
   chronicles, chronos,
   ./sync/sync_manager,
   ./consensus_object_pools/blockchain_dag,
diff --git a/beacon_chain/validators/validator_duties.nim b/beacon_chain/validators/validator_duties.nim
index 5ab3f24ef..333568aae 100644
--- a/beacon_chain/validators/validator_duties.nim
+++ b/beacon_chain/validators/validator_duties.nim
@@ -16,10 +16,10 @@ import
   std/[os, sequtils, tables],
 
   # Nimble packages
-  stew/[assign2, byteutils, objects],
+  stew/[byteutils, objects],
   chronos, metrics,
   chronicles, chronicles/timings,
-  json_serialization/std/[options, sets, net], serialization/errors,
+  json_serialization/std/[options, sets, net],
   eth/db/kvstore,
   eth/keys, eth/p2p/discoveryv5/[protocol, enr],
   web3/ethtypes,
@@ -36,7 +36,7 @@ import
   ../networking/eth2_network,
   ../sszdump, ../sync/sync_manager,
   ../gossip_processing/[block_processor, consensus_manager],
-  ".."/[conf, beacon_clock, beacon_node, version],
+  ".."/[conf, beacon_clock, beacon_node],
   "."/[slashing_protection, validator_pool, keystore_management]
 
 from eth/async_utils import awaitWithTimeout
@@ -526,7 +526,7 @@ proc forkchoice_updated(state: bellatrix.BeaconState,
     none(bellatrix.PayloadID)
 
 proc get_execution_payload(
-    payload_id: Option[bellatrix.PayloadId], execution_engine: Eth1Monitor):
+    payload_id: Option[bellatrix.PayloadID], execution_engine: Eth1Monitor):
     Future[bellatrix.ExecutionPayload] {.async.} =
   return if payload_id.isNone():
     # Pre-merge, empty payload