diff --git a/lib/cookie/cookie.ts b/lib/cookie/cookie.ts
index 4855255c..ff184475 100644
--- a/lib/cookie/cookie.ts
+++ b/lib/cookie/cookie.ts
@@ -32,7 +32,7 @@
 // This file was too big before we added max-lines, and it's ongoing work to reduce its size.
 /* eslint max-lines: [1, 750] */
 
-import * as pubsuffix from '../pubsuffix-psl'
+import { getPublicSuffix } from '../getPublicSuffix'
 import * as validators from '../validators'
 import { inOperator, NODEJS_UTIL_INSPECT_CUSTOM } from '../utils'
 
@@ -554,7 +554,7 @@ export class Cookie {
       if (cdomain.match(/\.$/)) {
         return false // S4.1.2.3 suggests that this is bad. domainMatch() tests confirm this
       }
-      const suffix = pubsuffix.getPublicSuffix(cdomain)
+      const suffix = getPublicSuffix(cdomain)
       if (suffix == null) {
         // it's a public suffix
         return false
diff --git a/lib/cookie/cookieJar.ts b/lib/cookie/cookieJar.ts
index 32cdd9b7..6b60e099 100644
--- a/lib/cookie/cookieJar.ts
+++ b/lib/cookie/cookieJar.ts
@@ -1,6 +1,6 @@
 import urlParse from 'url-parse'
 
-import * as pubsuffix from '../pubsuffix-psl'
+import { getPublicSuffix } from '../getPublicSuffix'
 import * as validators from '../validators'
 import { Store } from '../store'
 import { MemoryCookieStore } from '../memstore'
@@ -303,7 +303,7 @@ export class CookieJar {
         const cdomain = cookie.cdomain()
         const suffix =
           typeof cdomain === 'string'
-            ? pubsuffix.getPublicSuffix(cdomain, {
+            ? getPublicSuffix(cdomain, {
                 allowSpecialUseDomain: this.allowSpecialUseDomain,
                 ignoreError: options?.ignoreError,
               })
diff --git a/lib/cookie/index.ts b/lib/cookie/index.ts
index 1b167c28..f15b6f62 100644
--- a/lib/cookie/index.ts
+++ b/lib/cookie/index.ts
@@ -1,7 +1,7 @@
 export { MemoryCookieStore } from '../memstore'
 export { pathMatch } from '../pathMatch'
 export { permuteDomain } from '../permuteDomain'
-export { getPublicSuffix } from '../pubsuffix-psl'
+export { getPublicSuffix } from '../getPublicSuffix'
 export { Store } from '../store'
 export { ParameterError } from '../validators'
 export { version } from '../version'
@@ -18,4 +18,5 @@ export { parseDate } from './parseDate'
 export { permutePath } from './permutePath'
 
 import { Cookie } from './cookie'
+
 export const fromJSON = Cookie.fromJSON
diff --git a/lib/pubsuffix-psl.ts b/lib/getPublicSuffix.ts
similarity index 96%
rename from lib/pubsuffix-psl.ts
rename to lib/getPublicSuffix.ts
index a1cc5209..7e7967cf 100644
--- a/lib/pubsuffix-psl.ts
+++ b/lib/getPublicSuffix.ts
@@ -29,7 +29,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 'use strict'
-import * as psl from 'psl'
+import { getDomain } from 'tldts'
 
 // RFC 6761
 const SPECIAL_USE_DOMAINS = ['local', 'example', 'invalid', 'localhost', 'test']
@@ -84,5 +84,8 @@ export function getPublicSuffix(
     )
   }
 
-  return psl.get(domain)
+  return getDomain(domain, {
+    allowIcannDomains: true,
+    allowPrivateDomains: true,
+  })
 }
diff --git a/lib/permuteDomain.ts b/lib/permuteDomain.ts
index 0809a5df..195d7267 100644
--- a/lib/permuteDomain.ts
+++ b/lib/permuteDomain.ts
@@ -29,7 +29,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 'use strict'
-import { getPublicSuffix } from './pubsuffix-psl'
+import { getPublicSuffix } from './getPublicSuffix'
 
 // Gives the permutation of all possible domainMatch()es of a given domain. The
 // array is in shortest-to-longest order.  Handy for indexing.
diff --git a/package-lock.json b/package-lock.json
index 52f53349..3695d656 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,8 +9,8 @@
       "version": "5.0.0-rc.0",
       "license": "BSD-3-Clause",
       "dependencies": {
-        "psl": "^1.9.0",
         "punycode": "^2.3.1",
+        "tldts": "^6.1.0",
         "url-parse": "^1.5.10"
       },
       "devDependencies": {
@@ -1750,16 +1750,16 @@
       "dev": true
     },
     "node_modules/@typescript-eslint/eslint-plugin": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-6.19.0.tgz",
-      "integrity": "sha512-DUCUkQNklCQYnrBSSikjVChdc84/vMPDQSgJTHBZ64G9bA9w0Crc0rd2diujKbTdp6w2J47qkeHQLoi0rpLCdg==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-6.20.0.tgz",
+      "integrity": "sha512-fTwGQUnjhoYHeSF6m5pWNkzmDDdsKELYrOBxhjMrofPqCkoC2k3B2wvGHFxa1CTIqkEn88nlW1HVMztjo2K8Hg==",
       "dev": true,
       "dependencies": {
         "@eslint-community/regexpp": "^4.5.1",
-        "@typescript-eslint/scope-manager": "6.19.0",
-        "@typescript-eslint/type-utils": "6.19.0",
-        "@typescript-eslint/utils": "6.19.0",
-        "@typescript-eslint/visitor-keys": "6.19.0",
+        "@typescript-eslint/scope-manager": "6.20.0",
+        "@typescript-eslint/type-utils": "6.20.0",
+        "@typescript-eslint/utils": "6.20.0",
+        "@typescript-eslint/visitor-keys": "6.20.0",
         "debug": "^4.3.4",
         "graphemer": "^1.4.0",
         "ignore": "^5.2.4",
@@ -1785,15 +1785,15 @@
       }
     },
     "node_modules/@typescript-eslint/parser": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-6.19.0.tgz",
-      "integrity": "sha512-1DyBLG5SH7PYCd00QlroiW60YJ4rWMuUGa/JBV0iZuqi4l4IK3twKPq5ZkEebmGqRjXWVgsUzfd3+nZveewgow==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-6.20.0.tgz",
+      "integrity": "sha512-bYerPDF/H5v6V76MdMYhjwmwgMA+jlPVqjSDq2cRqMi8bP5sR3Z+RLOiOMad3nsnmDVmn2gAFCyNgh/dIrfP/w==",
       "dev": true,
       "dependencies": {
-        "@typescript-eslint/scope-manager": "6.19.0",
-        "@typescript-eslint/types": "6.19.0",
-        "@typescript-eslint/typescript-estree": "6.19.0",
-        "@typescript-eslint/visitor-keys": "6.19.0",
+        "@typescript-eslint/scope-manager": "6.20.0",
+        "@typescript-eslint/types": "6.20.0",
+        "@typescript-eslint/typescript-estree": "6.20.0",
+        "@typescript-eslint/visitor-keys": "6.20.0",
         "debug": "^4.3.4"
       },
       "engines": {
@@ -1813,13 +1813,13 @@
       }
     },
     "node_modules/@typescript-eslint/scope-manager": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-6.19.0.tgz",
-      "integrity": "sha512-dO1XMhV2ehBI6QN8Ufi7I10wmUovmLU0Oru3n5LVlM2JuzB4M+dVphCPLkVpKvGij2j/pHBWuJ9piuXx+BhzxQ==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-6.20.0.tgz",
+      "integrity": "sha512-p4rvHQRDTI1tGGMDFQm+GtxP1ZHyAh64WANVoyEcNMpaTFn3ox/3CcgtIlELnRfKzSs/DwYlDccJEtr3O6qBvA==",
       "dev": true,
       "dependencies": {
-        "@typescript-eslint/types": "6.19.0",
-        "@typescript-eslint/visitor-keys": "6.19.0"
+        "@typescript-eslint/types": "6.20.0",
+        "@typescript-eslint/visitor-keys": "6.20.0"
       },
       "engines": {
         "node": "^16.0.0 || >=18.0.0"
@@ -1830,13 +1830,13 @@
       }
     },
     "node_modules/@typescript-eslint/type-utils": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-6.19.0.tgz",
-      "integrity": "sha512-mcvS6WSWbjiSxKCwBcXtOM5pRkPQ6kcDds/juxcy/727IQr3xMEcwr/YLHW2A2+Fp5ql6khjbKBzOyjuPqGi/w==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-6.20.0.tgz",
+      "integrity": "sha512-qnSobiJQb1F5JjN0YDRPHruQTrX7ICsmltXhkV536mp4idGAYrIyr47zF/JmkJtEcAVnIz4gUYJ7gOZa6SmN4g==",
       "dev": true,
       "dependencies": {
-        "@typescript-eslint/typescript-estree": "6.19.0",
-        "@typescript-eslint/utils": "6.19.0",
+        "@typescript-eslint/typescript-estree": "6.20.0",
+        "@typescript-eslint/utils": "6.20.0",
         "debug": "^4.3.4",
         "ts-api-utils": "^1.0.1"
       },
@@ -1857,9 +1857,9 @@
       }
     },
     "node_modules/@typescript-eslint/types": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-6.19.0.tgz",
-      "integrity": "sha512-lFviGV/vYhOy3m8BJ/nAKoAyNhInTdXpftonhWle66XHAtT1ouBlkjL496b5H5hb8dWXHwtypTqgtb/DEa+j5A==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-6.20.0.tgz",
+      "integrity": "sha512-MM9mfZMAhiN4cOEcUOEx+0HmuaW3WBfukBZPCfwSqFnQy0grXYtngKCqpQN339X3RrwtzspWJrpbrupKYUSBXQ==",
       "dev": true,
       "engines": {
         "node": "^16.0.0 || >=18.0.0"
@@ -1870,13 +1870,13 @@
       }
     },
     "node_modules/@typescript-eslint/typescript-estree": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-6.19.0.tgz",
-      "integrity": "sha512-o/zefXIbbLBZ8YJ51NlkSAt2BamrK6XOmuxSR3hynMIzzyMY33KuJ9vuMdFSXW+H0tVvdF9qBPTHA91HDb4BIQ==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-6.20.0.tgz",
+      "integrity": "sha512-RnRya9q5m6YYSpBN7IzKu9FmLcYtErkDkc8/dKv81I9QiLLtVBHrjz+Ev/crAqgMNW2FCsoZF4g2QUylMnJz+g==",
       "dev": true,
       "dependencies": {
-        "@typescript-eslint/types": "6.19.0",
-        "@typescript-eslint/visitor-keys": "6.19.0",
+        "@typescript-eslint/types": "6.20.0",
+        "@typescript-eslint/visitor-keys": "6.20.0",
         "debug": "^4.3.4",
         "globby": "^11.1.0",
         "is-glob": "^4.0.3",
@@ -1922,17 +1922,17 @@
       }
     },
     "node_modules/@typescript-eslint/utils": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-6.19.0.tgz",
-      "integrity": "sha512-QR41YXySiuN++/dC9UArYOg4X86OAYP83OWTewpVx5ct1IZhjjgTLocj7QNxGhWoTqknsgpl7L+hGygCO+sdYw==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-6.20.0.tgz",
+      "integrity": "sha512-/EKuw+kRu2vAqCoDwDCBtDRU6CTKbUmwwI7SH7AashZ+W+7o8eiyy6V2cdOqN49KsTcASWsC5QeghYuRDTyOOg==",
       "dev": true,
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.4.0",
         "@types/json-schema": "^7.0.12",
         "@types/semver": "^7.5.0",
-        "@typescript-eslint/scope-manager": "6.19.0",
-        "@typescript-eslint/types": "6.19.0",
-        "@typescript-eslint/typescript-estree": "6.19.0",
+        "@typescript-eslint/scope-manager": "6.20.0",
+        "@typescript-eslint/types": "6.20.0",
+        "@typescript-eslint/typescript-estree": "6.20.0",
         "semver": "^7.5.4"
       },
       "engines": {
@@ -1947,12 +1947,12 @@
       }
     },
     "node_modules/@typescript-eslint/visitor-keys": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-6.19.0.tgz",
-      "integrity": "sha512-hZaUCORLgubBvtGpp1JEFEazcuEdfxta9j4iUwdSAr7mEsYYAp3EAUyCZk3VEEqGj6W+AV4uWyrDGtrlawAsgQ==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-6.20.0.tgz",
+      "integrity": "sha512-E8Cp98kRe4gKHjJD4NExXKz/zOJ1A2hhZc+IMVD6i7w4yjIvh6VyuRI0gRtxAsXtoC35uGMaQ9rjI2zJaXDEAw==",
       "dev": true,
       "dependencies": {
-        "@typescript-eslint/types": "6.19.0",
+        "@typescript-eslint/types": "6.20.0",
         "eslint-visitor-keys": "^3.4.1"
       },
       "engines": {
@@ -6017,9 +6017,9 @@
       }
     },
     "node_modules/prettier": {
-      "version": "3.2.2",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.2.2.tgz",
-      "integrity": "sha512-HTByuKZzw7utPiDO523Tt2pLtEyK7OibUD9suEJQrPUCYQqrHr74GGX6VidMrovbf/I50mPqr8j/II6oBAuc5A==",
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.2.4.tgz",
+      "integrity": "sha512-FWu1oLHKCrtpO1ypU6J0SbK2d9Ckwysq6bHj/uaCP26DxrPpppCLQRGVuqAxSTvhF00AcvDRyYrLNW7ocBhFFQ==",
       "dev": true,
       "bin": {
         "prettier": "bin/prettier.cjs"
@@ -6082,11 +6082,6 @@
         "node": ">= 6"
       }
     },
-    "node_modules/psl": {
-      "version": "1.9.0",
-      "resolved": "https://registry.npmjs.org/psl/-/psl-1.9.0.tgz",
-      "integrity": "sha512-E/ZsdU4HLs/68gYzgGTkMicWTLPdAftJLfJFlLUAAKZGkStNU72sZjT66SnMDVOfOWY/YAoiD7Jxa9iHvngcag=="
-    },
     "node_modules/punycode": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
@@ -6483,6 +6478,22 @@
       "integrity": "sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=",
       "dev": true
     },
+    "node_modules/tldts": {
+      "version": "6.1.4",
+      "resolved": "https://registry.npmjs.org/tldts/-/tldts-6.1.4.tgz",
+      "integrity": "sha512-eplXjucWEMwmGd8PSI/cjwGid0dVRdLZwO+x8cUTzfgA/u9wP9D5C6qcg42MMBgBeEcgDiUTqH7wBlTYLIODWQ==",
+      "dependencies": {
+        "tldts-core": "^6.1.4"
+      },
+      "bin": {
+        "tldts": "bin/cli.js"
+      }
+    },
+    "node_modules/tldts-core": {
+      "version": "6.1.4",
+      "resolved": "https://registry.npmjs.org/tldts-core/-/tldts-core-6.1.4.tgz",
+      "integrity": "sha512-9rlteMsuqWQaWlLhnqCOeAXW1jqahlBHXOhCHu1GkkNBbjitbEqhDQC1Br6W/2PZJTTh8f+QIk5GstyZFC26Bg=="
+    },
     "node_modules/tmpl": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/tmpl/-/tmpl-1.0.5.tgz",
@@ -6523,9 +6534,9 @@
       }
     },
     "node_modules/ts-jest": {
-      "version": "29.1.1",
-      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-29.1.1.tgz",
-      "integrity": "sha512-D6xjnnbP17cC85nliwGiL+tpoKN0StpgE0TeOjXQTU6MVCfsB4v7aW05CgQ/1OywGb0x/oy9hHFnN+sczTiRaA==",
+      "version": "29.1.2",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-29.1.2.tgz",
+      "integrity": "sha512-br6GJoH/WUX4pu7FbZXuWGKGNDuU7b8Uj77g/Sp7puZV6EXzuByl6JrECvm0MzVzSTkSHWTihsXt+5XYER5b+g==",
       "dev": true,
       "dependencies": {
         "bs-logger": "0.x",
@@ -6541,7 +6552,7 @@
         "ts-jest": "cli.js"
       },
       "engines": {
-        "node": "^14.15.0 || ^16.10.0 || >=18.0.0"
+        "node": "^16.10.0 || ^18.0.0 || >=20.0.0"
       },
       "peerDependencies": {
         "@babel/core": ">=7.0.0-beta.0 <8",
@@ -8226,16 +8237,16 @@
       "dev": true
     },
     "@typescript-eslint/eslint-plugin": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-6.19.0.tgz",
-      "integrity": "sha512-DUCUkQNklCQYnrBSSikjVChdc84/vMPDQSgJTHBZ64G9bA9w0Crc0rd2diujKbTdp6w2J47qkeHQLoi0rpLCdg==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-6.20.0.tgz",
+      "integrity": "sha512-fTwGQUnjhoYHeSF6m5pWNkzmDDdsKELYrOBxhjMrofPqCkoC2k3B2wvGHFxa1CTIqkEn88nlW1HVMztjo2K8Hg==",
       "dev": true,
       "requires": {
         "@eslint-community/regexpp": "^4.5.1",
-        "@typescript-eslint/scope-manager": "6.19.0",
-        "@typescript-eslint/type-utils": "6.19.0",
-        "@typescript-eslint/utils": "6.19.0",
-        "@typescript-eslint/visitor-keys": "6.19.0",
+        "@typescript-eslint/scope-manager": "6.20.0",
+        "@typescript-eslint/type-utils": "6.20.0",
+        "@typescript-eslint/utils": "6.20.0",
+        "@typescript-eslint/visitor-keys": "6.20.0",
         "debug": "^4.3.4",
         "graphemer": "^1.4.0",
         "ignore": "^5.2.4",
@@ -8245,54 +8256,54 @@
       }
     },
     "@typescript-eslint/parser": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-6.19.0.tgz",
-      "integrity": "sha512-1DyBLG5SH7PYCd00QlroiW60YJ4rWMuUGa/JBV0iZuqi4l4IK3twKPq5ZkEebmGqRjXWVgsUzfd3+nZveewgow==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-6.20.0.tgz",
+      "integrity": "sha512-bYerPDF/H5v6V76MdMYhjwmwgMA+jlPVqjSDq2cRqMi8bP5sR3Z+RLOiOMad3nsnmDVmn2gAFCyNgh/dIrfP/w==",
       "dev": true,
       "requires": {
-        "@typescript-eslint/scope-manager": "6.19.0",
-        "@typescript-eslint/types": "6.19.0",
-        "@typescript-eslint/typescript-estree": "6.19.0",
-        "@typescript-eslint/visitor-keys": "6.19.0",
+        "@typescript-eslint/scope-manager": "6.20.0",
+        "@typescript-eslint/types": "6.20.0",
+        "@typescript-eslint/typescript-estree": "6.20.0",
+        "@typescript-eslint/visitor-keys": "6.20.0",
         "debug": "^4.3.4"
       }
     },
     "@typescript-eslint/scope-manager": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-6.19.0.tgz",
-      "integrity": "sha512-dO1XMhV2ehBI6QN8Ufi7I10wmUovmLU0Oru3n5LVlM2JuzB4M+dVphCPLkVpKvGij2j/pHBWuJ9piuXx+BhzxQ==",
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-6.20.0.tgz",
+      "integrity": "sha512-p4rvHQRDTI1tGGMDFQm+GtxP1ZHyAh64WANVoyEcNMpaTFn3ox/3CcgtIlELnRfKzSs/DwYlDccJEtr3O6qBvA==",
       "dev": true,
       "requires": {
-        "@typescript-eslint/types": "6.19.0",
-        "@typescript-eslint/visitor-keys": "6.19.0"
+        "@typescript-eslint/types": "6.20.0",
+        "@typescript-eslint/visitor-keys": "6.20.0"
       }
     },
     "@typescript-eslint/type-utils": {
-      "version": "6.19.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-6.19.0.tgz",
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+      "version": "6.20.0",
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-        "@typescript-eslint/types": "6.19.0",
-        "@typescript-eslint/typescript-estree": "6.19.0",
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@@ -11331,9 +11342,9 @@
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@@ -11374,11 +11385,6 @@
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@@ -11650,6 +11656,19 @@
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+      "resolved": "https://registry.npmjs.org/tldts/-/tldts-6.1.4.tgz",
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+      }
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+      "resolved": "https://registry.npmjs.org/tldts-core/-/tldts-core-6.1.4.tgz",
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@@ -11679,9 +11698,9 @@
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diff --git a/package.json b/package.json
index b84d874b..74be9da4 100644
--- a/package.json
+++ b/package.json
@@ -119,7 +119,7 @@
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