diff --git a/.yarnrc.yml b/.yarnrc.yml
index 625097e..58f0fdf 100644
--- a/.yarnrc.yml
+++ b/.yarnrc.yml
@@ -1,2 +1,5 @@
 nodeLinker: node-modules
 npmMinimalAgeGate: 5d
+# Packages maintained by Reviewable, exempt from the age gate.
+npmPreapprovedPackages:
+  - firebase-childrenkeys
diff --git a/package.json b/package.json
index a49a589..8169e8c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "nodefire",
-  "version": "4.1.0",
+  "version": "5.0.0",
   "description": "A promise-centric Firebase library for NodeJS",
   "main": "built/index.js",
   "types": "built/index.d.ts",
@@ -33,7 +33,7 @@
   "homepage": "https://github.com/Reviewable/nodefire",
   "dependencies": {
     "firebase-admin": "10.x || 11.x || 12.x || 13.x",
-    "firebase-childrenkeys": "^2.3.5",
+    "firebase-childrenkeys": "^3.0.0",
     "firefight": "1.x",
     "lodash": "^4.17.21",
     "lru-cache": "11.x",
diff --git a/src/nodefire.ts b/src/nodefire.ts
index 92b4c92..865d791 100644
--- a/src/nodefire.ts
+++ b/src/nodefire.ts
@@ -4,7 +4,6 @@ import _ from 'lodash';
 import {LRUCache} from 'lru-cache';
 import firebaseChildrenKeys from 'firebase-childrenkeys';
 import {Simulator} from 'firefight';
-import {Agent} from 'http';
 
 export type InterceptOperationsCallback = (
   op: {ref: NodeFire, method: string, args: any[]},
@@ -605,12 +604,9 @@ export default class NodeFire<
    *   - maxTries: the maximum number of times to try to fetch the keys, in case of transient
    *        errors (defaults to 1)
    *   - retryInterval: the number of milliseconds to delay between retries (defaults to 1000)
-   *   - agent: http.Agent
    * @return {Promise<string[]>} A promise that resolves to an array of key strings.
    */
-  childrenKeys(options: {
-    maxTries?: number, retryInterval?: number, agent?: Agent
-  }): Promise<string[]> {
+  childrenKeys(options: {maxTries?: number, retryInterval?: number}): Promise<string[]> {
     return this.$ref.ref.childrenKeys ?
       this.$ref.ref.childrenKeys(options) :
       firebaseChildrenKeys(this.$ref, options);
diff --git a/yarn.lock b/yarn.lock
index 53c3ec3..02ce385 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1034,17 +1034,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"axios@npm:^1.2.1":
-  version: 1.14.0
-  resolution: "axios@npm:1.14.0"
-  dependencies:
-    follow-redirects: "npm:^1.15.11"
-    form-data: "npm:^4.0.5"
-    proxy-from-env: "npm:^2.1.0"
-  checksum: 10c0/2541f4aa215a7d1842429dad006fc682d82bc0e74bd14500823f7d8cce3bbae0e0a8c328c8538946718f366ab8ce5a4c12e9ad40e5a0f3482ff8bff0cd115d45
-  languageName: node
-  linkType: hard
-
 "balanced-match@npm:^1.0.0":
   version: 1.0.2
   resolution: "balanced-match@npm:1.0.2"
@@ -1851,15 +1840,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"firebase-childrenkeys@npm:^2.3.5":
-  version: 2.6.2
-  resolution: "firebase-childrenkeys@npm:2.6.2"
+"firebase-childrenkeys@npm:^3.0.0":
+  version: 3.0.0
+  resolution: "firebase-childrenkeys@npm:3.0.0"
   dependencies:
-    axios: "npm:^1.2.1"
     sleep-promise: "npm:^9.1.0"
   peerDependencies:
     firebase-admin: 5.x || 6.x || 7.x || 8.x || 9.x || 10.x || 11.x || 12.x || 13.x
-  checksum: 10c0/a896c3a522d5a0965e8117dfdd5c65d7d92e2aa6489ebb6d62bfa61acea81db58f242e2ec8cc8a781863e9e8973d7433db671f73fdcb0606dbe256173f29b542
+  checksum: 10c0/d8690a8277670226728ac96ff7e75a2720fcc556c2ae1dc028c9dfe1c98626d8ccd42242aedbe5369d804996d54f292cbe9ac5980c44b1bac1d3fc3b618fb477
   languageName: node
   linkType: hard
 
@@ -1908,16 +1896,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"follow-redirects@npm:^1.15.11":
-  version: 1.15.11
-  resolution: "follow-redirects@npm:1.15.11"
-  peerDependenciesMeta:
-    debug:
-      optional: true
-  checksum: 10c0/d301f430542520a54058d4aeeb453233c564aaccac835d29d15e050beb33f339ad67d9bddbce01739c5dc46a6716dbe3d9d0d5134b1ca203effa11a7ef092343
-  languageName: node
-  linkType: hard
-
 "for-each@npm:^0.3.3, for-each@npm:^0.3.5":
   version: 0.3.5
   resolution: "for-each@npm:0.3.5"
@@ -1941,19 +1919,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"form-data@npm:^4.0.5":
-  version: 4.0.5
-  resolution: "form-data@npm:4.0.5"
-  dependencies:
-    asynckit: "npm:^0.4.0"
-    combined-stream: "npm:^1.0.8"
-    es-set-tostringtag: "npm:^2.1.0"
-    hasown: "npm:^2.0.2"
-    mime-types: "npm:^2.1.12"
-  checksum: 10c0/dd6b767ee0bbd6d84039db12a0fa5a2028160ffbfaba1800695713b46ae974a5f6e08b3356c3195137f8530dcd9dfcb5d5ae1eeff53d0db1e5aad863b619ce3b
-  languageName: node
-  linkType: hard
-
 "formdata-polyfill@npm:^4.0.10":
   version: 4.0.10
   resolution: "formdata-polyfill@npm:4.0.10"
@@ -2898,7 +2863,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"mime-types@npm:^2.1.12, mime-types@npm:^2.1.35":
+"mime-types@npm:^2.1.35":
   version: 2.1.35
   resolution: "mime-types@npm:2.1.35"
   dependencies:
@@ -3010,7 +2975,7 @@ __metadata:
     "@types/lodash": "npm:^4.14.191"
     "@types/safe-timers": "npm:^1.1.0"
     firebase-admin: "npm:10.x || 11.x || 12.x || 13.x"
-    firebase-childrenkeys: "npm:^2.3.5"
+    firebase-childrenkeys: "npm:^3.0.0"
     firefight: "npm:1.x"
     lodash: "npm:^4.17.21"
     lru-cache: "npm:11.x"
@@ -3240,13 +3205,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"proxy-from-env@npm:^2.1.0":
-  version: 2.1.0
-  resolution: "proxy-from-env@npm:2.1.0"
-  checksum: 10c0/ed01729fd4d094eab619cd7e17ce3698b3413b31eb102c4904f9875e677cd207392795d5b4adee9cec359dfd31c44d5ad7595a3a3ad51c40250e141512281c58
-  languageName: node
-  linkType: hard
-
 "punycode@npm:^2.1.0":
   version: 2.3.1
   resolution: "punycode@npm:2.3.1"