diff --git a/docs/options.md b/docs/options.md
index 6f74b02b3..fdce7f571 100644
--- a/docs/options.md
+++ b/docs/options.md
@@ -344,7 +344,7 @@ Include human-readable messages in errors. `true` by default. `false` can be pas
 
 ### uriResolver
 
-By default `uriResolver` is undefined and relies on the embedded uriResolver [uri-js](https://github.com/garycourt/uri-js). Pass an object that satisfies the interface [UriResolver](https://github.com/ajv-validator/ajv/blob/master/lib/types/index.ts) to be used in replacement. One alternative is [fast-uri](https://github.com/fastify/fast-uri).
+By default `uriResolver` is undefined and relies on the embedded uriResolver [fast-uri](https://github.com/fastify/fast-uri). Pass an object that satisfies the interface [UriResolver](https://github.com/ajv-validator/ajv/blob/master/lib/types/index.ts) to be used in replacement. One alternative is [uri-js](https://github.com/garycourt/uri-js).
 
 ### code <Badge text="v7" />
 
diff --git a/lib/compile/index.ts b/lib/compile/index.ts
index 3dac2699b..bfc393455 100644
--- a/lib/compile/index.ts
+++ b/lib/compile/index.ts
@@ -14,7 +14,7 @@ import N from "./names"
 import {LocalRefs, getFullPath, _getFullPath, inlineRef, normalizeId, resolveUrl} from "./resolve"
 import {schemaHasRulesButRef, unescapeFragment} from "./util"
 import {validateFunctionCode} from "./validate"
-import * as URI from "uri-js"
+import {URIComponent} from "fast-uri"
 import {JSONType} from "./rules"
 
 export type SchemaRefs = {
@@ -295,7 +295,7 @@ const PREVENT_SCOPE_CHANGE = new Set([
 
 function getJsonPointer(
   this: Ajv,
-  parsedRef: URI.URIComponents,
+  parsedRef: URIComponent,
   {baseId, schema, root}: SchemaEnv
 ): SchemaEnv | undefined {
   if (parsedRef.fragment?.[0] !== "/") return
diff --git a/lib/compile/resolve.ts b/lib/compile/resolve.ts
index be283866c..b8c4aca39 100644
--- a/lib/compile/resolve.ts
+++ b/lib/compile/resolve.ts
@@ -1,6 +1,6 @@
 import type {AnySchema, AnySchemaObject, UriResolver} from "../types"
 import type Ajv from "../ajv"
-import type {URIComponents} from "uri-js"
+import type {URIComponent} from "fast-uri"
 import {eachItem} from "./util"
 import * as equal from "fast-deep-equal"
 import * as traverse from "json-schema-traverse"
@@ -73,7 +73,7 @@ export function getFullPath(resolver: UriResolver, id = "", normalize?: boolean)
   return _getFullPath(resolver, p)
 }
 
-export function _getFullPath(resolver: UriResolver, p: URIComponents): string {
+export function _getFullPath(resolver: UriResolver, p: URIComponent): string {
   const serialized = resolver.serialize(p)
   return serialized.split("#")[0] + "#"
 }
diff --git a/lib/runtime/uri.ts b/lib/runtime/uri.ts
index 7dd35f9d1..5450549cd 100644
--- a/lib/runtime/uri.ts
+++ b/lib/runtime/uri.ts
@@ -1,4 +1,4 @@
-import * as uri from "uri-js"
+import * as uri from "fast-uri"
 
 type URI = typeof uri & {code: string}
 ;(uri as URI).code = 'require("ajv/dist/runtime/uri").default'
diff --git a/lib/types/index.ts b/lib/types/index.ts
index b5ef53eeb..39bc51b0b 100644
--- a/lib/types/index.ts
+++ b/lib/types/index.ts
@@ -1,4 +1,4 @@
-import * as URI from "uri-js"
+import {URIComponent} from "fast-uri"
 import type {CodeGen, Code, Name, ScopeValueSets, ValueScopeName} from "../compile/codegen"
 import type {SchemaEnv, SchemaCxt, SchemaObjCxt} from "../compile"
 import type {JSONType} from "../compile/rules"
@@ -238,7 +238,7 @@ export interface RegExpLike {
 }
 
 export interface UriResolver {
-  parse(uri: string): URI.URIComponents
+  parse(uri: string): URIComponent
   resolve(base: string, path: string): string
-  serialize(component: URI.URIComponents): string
+  serialize(component: URIComponent): string
 }
diff --git a/spec/resolve.spec.ts b/spec/resolve.spec.ts
index 2fe5b1041..a89cccaf7 100644
--- a/spec/resolve.spec.ts
+++ b/spec/resolve.spec.ts
@@ -4,17 +4,17 @@ import _Ajv from "./ajv"
 import type {AnyValidateFunction} from "../dist/types"
 import type MissingRefError from "../dist/compile/ref_error"
 import chai from "./chai"
-import * as fastUri from "fast-uri"
+import * as uriJs from "uri-js"
 const should = chai.should()
 
-const uriResolvers = [undefined, fastUri]
+const uriResolvers = [undefined, uriJs]
 
 uriResolvers.forEach((resolver) => {
   let describeTitle: string
   if (resolver !== undefined) {
-    describeTitle = "fast-uri resolver"
-  } else {
     describeTitle = "uri-js resolver"
+  } else {
+    describeTitle = "fast-uri resolver"
   }
   describe(describeTitle, () => {
     describe("resolve", () => {