diff --git a/docs/api.md b/docs/api.md
index 5dfb0c3090..2a06807309 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -251,7 +251,7 @@ Add validation keyword to Ajv instance.
 
 Keyword should be different from all standard JSON Schema keywords and different from previously defined keywords. There is no way to redefine keywords or to remove keyword definition from the instance.
 
-Keyword must start with a letter, `_` or `$`, and may continue with letters, numbers, `_`, `$`, or `-`.
+Keyword must start with an ASCII letter, `_` or `$`, and may continue with ASCII letters, numbers, `_`, `$`, `-`, or `:`.
 It is recommended to use an application-specific prefix for keywords to avoid current and future name collisions.
 
 Example Keywords:
diff --git a/docs/guide/modifying-data.md b/docs/guide/modifying-data.md
index 2705c0bedf..5b1d893bd3 100644
--- a/docs/guide/modifying-data.md
+++ b/docs/guide/modifying-data.md
@@ -210,7 +210,7 @@ With `useDefaults` option `default` keywords throws exception during schema comp
 
 The strict mode option can change the behaviour for these unsupported defaults (`strict: false` to ignore them, `"log"` to log a warning).
 
-See [Strict mode](./strict-mode.md).
+See [Strict mode](../strict-mode.md).
 
 ::: tip Default with discriminator keyword
 Defaults will be assigned in schemas inside `oneOf` in case [discriminator](../json-schema.md#discriminator) keyword is used.
diff --git a/lib/types/json-schema.ts b/lib/types/json-schema.ts
index 281a38bdb0..065c972e54 100644
--- a/lib/types/json-schema.ts
+++ b/lib/types/json-schema.ts
@@ -108,25 +108,25 @@ type UncheckedJSONSchemaType<T, IsPartial extends boolean> = (
             : UncheckedPropertiesSchema<T>
           patternProperties?: Record<string, UncheckedJSONSchemaType<T[string], false>>
           propertyNames?: Omit<UncheckedJSONSchemaType<string, false>, "type"> & {type?: "string"}
-          dependencies?: {[K in keyof T]?: Readonly<(keyof T)[]> | UncheckedPartialSchema<T>}
-          dependentRequired?: {[K in keyof T]?: Readonly<(keyof T)[]>}
+          dependencies?: {[K in keyof T]?: readonly (keyof T)[] | UncheckedPartialSchema<T>}
+          dependentRequired?: {[K in keyof T]?: readonly (keyof T)[]}
           dependentSchemas?: {[K in keyof T]?: UncheckedPartialSchema<T>}
           minProperties?: number
           maxProperties?: number
         } & (IsPartial extends true // "required" is not necessary if it's a non-partial type with no required keys // are listed it only asserts that optional cannot be listed. // "required" type does not guarantee that all required properties
-          ? {required: Readonly<(keyof T)[]>}
+          ? {required: readonly (keyof T)[]}
           : [UncheckedRequiredMembers<T>] extends [never]
-          ? {required?: Readonly<UncheckedRequiredMembers<T>[]>}
-          : {required: Readonly<UncheckedRequiredMembers<T>[]>})
+          ? {required?: readonly UncheckedRequiredMembers<T>[]}
+          : {required: readonly UncheckedRequiredMembers<T>[]})
       : T extends null
       ? {
           type: JSONType<"null", IsPartial>
           nullable: true
         }
       : never) & {
-      allOf?: Readonly<UncheckedPartialSchema<T>[]>
-      anyOf?: Readonly<UncheckedPartialSchema<T>[]>
-      oneOf?: Readonly<UncheckedPartialSchema<T>[]>
+      allOf?: readonly UncheckedPartialSchema<T>[]
+      anyOf?: readonly UncheckedPartialSchema<T>[]
+      oneOf?: readonly UncheckedPartialSchema<T>[]
       if?: UncheckedPartialSchema<T>
       then?: UncheckedPartialSchema<T>
       else?: UncheckedPartialSchema<T>
@@ -176,12 +176,12 @@ type Nullable<T> = undefined extends T
   ? {
       nullable: true
       const?: null // any non-null value would fail `const: null`, `null` would fail any other value in const
-      enum?: Readonly<(T | null)[]> // `null` must be explicitly included in "enum" for `null` to pass
+      enum?: readonly (T | null)[] // `null` must be explicitly included in "enum" for `null` to pass
       default?: T | null
     }
   : {
       nullable?: false
       const?: T
-      enum?: Readonly<T[]>
+      enum?: readonly T[]
       default?: T
     }
diff --git a/package.json b/package.json
index 5198552a1c..17df7b1473 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ajv",
-  "version": "8.16.0",
+  "version": "8.17.1",
   "description": "Another JSON Schema Validator",
   "main": "dist/ajv.js",
   "types": "dist/ajv.d.ts",
@@ -59,7 +59,7 @@
   "runkitExampleFilename": ".runkit_example.js",
   "dependencies": {
     "fast-deep-equal": "^3.1.3",
-    "fast-uri": "^2.4.0",
+    "fast-uri": "^3.0.1",
     "json-schema-traverse": "^1.0.0",
     "require-from-string": "^2.0.2"
   },
diff --git a/spec/resolve.spec.ts b/spec/resolve.spec.ts
index a89cccaf72..032f99ff83 100644
--- a/spec/resolve.spec.ts
+++ b/spec/resolve.spec.ts
@@ -180,6 +180,41 @@ uriResolvers.forEach((resolver) => {
         })
       })
 
+      describe("URIs with encoded characters (issue #2447)", () => {
+        it("should resolve the ref", () => {
+          const schema = {
+            $ref: "#/definitions/Record%3Cstring%2CPerson%3E",
+            $schema: "http://json-schema.org/draft-07/schema#",
+            definitions: {
+              Person: {
+                type: "object",
+                properties: {
+                  firstName: {
+                    type: "string",
+                    description: "The person's first name.",
+                  },
+                },
+              },
+              "Record<string,Person>": {
+                type: "object",
+                additionalProperties: {
+                  $ref: "#/definitions/Person",
+                },
+              },
+            },
+          }
+          const data = {
+            joe: {
+              firstName: "Joe",
+            },
+          }
+          instances.forEach((ajv) => {
+            const validate = ajv.compile(schema)
+            validate(data).should.equal(true)
+          })
+        })
+      })
+
       describe("missing schema error", function () {
         this.timeout(4000)