diff --git a/packages/lodestar-validator/src/api/LocalClock.ts b/packages/lodestar-validator/src/api/LocalClock.ts
index ae0d24125653..bf11b884def2 100644
--- a/packages/lodestar-validator/src/api/LocalClock.ts
+++ b/packages/lodestar-validator/src/api/LocalClock.ts
@@ -1,3 +1,4 @@
+import {AbortSignal} from "abort-controller";
 import {Epoch, Slot} from "@chainsafe/lodestar-types";
 import {IBeaconConfig} from "@chainsafe/lodestar-config";
 import {computeEpochAtSlot, getCurrentSlot} from "@chainsafe/lodestar-beacon-state-transition";
diff --git a/packages/lodestar-validator/src/util/misc.ts b/packages/lodestar-validator/src/util/misc.ts
index f81717e2083c..180438cec000 100644
--- a/packages/lodestar-validator/src/util/misc.ts
+++ b/packages/lodestar-validator/src/util/misc.ts
@@ -1,3 +1,5 @@
+import {AbortSignal} from "abort-controller";
+
 export function sleep(ms: number): Promise<void> {
   return new Promise((resolve) => setTimeout(resolve, ms));
 }
diff --git a/packages/lodestar/src/chain/blocks/processor.ts b/packages/lodestar/src/chain/blocks/processor.ts
index 38abf6e8e161..f7b5fd3c58f3 100644
--- a/packages/lodestar/src/chain/blocks/processor.ts
+++ b/packages/lodestar/src/chain/blocks/processor.ts
@@ -1,3 +1,4 @@
+import {AbortSignal} from "abort-controller";
 import {IBeaconConfig} from "@chainsafe/lodestar-config";
 import {IForkChoice} from "@chainsafe/lodestar-fork-choice";
 
diff --git a/packages/lodestar/src/chain/clock/LocalClock.ts b/packages/lodestar/src/chain/clock/LocalClock.ts
index 476be10ed191..40d002cc3e71 100644
--- a/packages/lodestar/src/chain/clock/LocalClock.ts
+++ b/packages/lodestar/src/chain/clock/LocalClock.ts
@@ -1,3 +1,4 @@
+import {AbortSignal} from "abort-controller";
 import {Epoch, Slot} from "@chainsafe/lodestar-types";
 import {IBeaconConfig} from "@chainsafe/lodestar-config";
 import {ErrorAborted} from "@chainsafe/lodestar-utils";
diff --git a/packages/lodestar/src/chain/eventHandlers.ts b/packages/lodestar/src/chain/eventHandlers.ts
index d16caa1bfd49..47dd9ce93baf 100644
--- a/packages/lodestar/src/chain/eventHandlers.ts
+++ b/packages/lodestar/src/chain/eventHandlers.ts
@@ -1,3 +1,4 @@
+import {AbortSignal} from "abort-controller";
 import {readOnlyMap, toHexString} from "@chainsafe/ssz";
 import {Attestation, Checkpoint, SignedBeaconBlock, Slot, Version} from "@chainsafe/lodestar-types";
 import {ILogger} from "@chainsafe/lodestar-utils";
diff --git a/packages/lodestar/src/chain/regen/queued.ts b/packages/lodestar/src/chain/regen/queued.ts
index 202ce3789bf2..f3f95392171f 100644
--- a/packages/lodestar/src/chain/regen/queued.ts
+++ b/packages/lodestar/src/chain/regen/queued.ts
@@ -1,3 +1,4 @@
+import {AbortSignal} from "abort-controller";
 import {BeaconBlock, Root, Checkpoint, Slot} from "@chainsafe/lodestar-types";
 import {IBeaconConfig} from "@chainsafe/lodestar-config";
 import {IForkChoice} from "@chainsafe/lodestar-fork-choice";
diff --git a/packages/lodestar/src/util/queue.ts b/packages/lodestar/src/util/queue.ts
index c77386508922..eed3807702db 100644
--- a/packages/lodestar/src/util/queue.ts
+++ b/packages/lodestar/src/util/queue.ts
@@ -1,3 +1,4 @@
+import {AbortSignal} from "abort-controller";
 import pushable, {Pushable} from "it-pushable";
 import pipe from "it-pipe";