diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6f965e2..bf1014a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,7 @@
 name: CI
 on:
-  push: {branches: [master]}
+  push: 
+    branches: [master]
   pull_request:
 
 jobs:
@@ -13,5 +14,5 @@ jobs:
       - run: dart pub get
       - run: dart analyze --fatal-warnings .
       - run: dart format --set-exit-if-changed .
-      - run: dart run test -x integration
-      - run: dart test/e2e_test.dart
+      - run: dart test -x integration
+      - run: dart run test/e2e_test.dart
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 191b1f9..02e95cb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 3.1.0
+
+- Require Dart 3.0 or later
+- Update to latest dependencies supporting Dart 3 and 3.1
+
 ## 3.0.0
 
 - Require Dart 2.18 and support Dart 3
diff --git a/analysis_options.yaml b/analysis_options.yaml
index bf1a751..2ce03da 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -9,13 +9,25 @@ analyzer:
 linter:
   rules:
     - always_declare_return_types
+    - combinators_ordering
     - comment_references
+    - dangling_library_doc_comments
+    - deprecated_member_use_from_same_package
+    - implicit_call_tearoffs
+    - implicit_reopen
+    - library_annotations
+    - matching_super_parameters
+    - no_literal_bool_comparisons
     - omit_local_variable_types
     - prefer_final_fields
     - prefer_final_in_for_each
     - prefer_final_locals
     - prefer_single_quotes
     - type_annotate_public_apis
+    - type_literal_in_constant_pattern
     - unawaited_futures
+    - unnecessary_library_directive
+    - unreachable_from_main
     - use_enums
+    - use_string_in_part_of_directives
     - use_super_parameters
diff --git a/lib/linkcheck.dart b/lib/linkcheck.dart
index b61b348..503f31d 100644
--- a/lib/linkcheck.dart
+++ b/lib/linkcheck.dart
@@ -25,7 +25,7 @@ const hostsFlag = 'hosts';
 const inputFlag = 'input-file';
 const redirectFlag = 'show-redirects';
 const skipFlag = 'skip-file';
-const version = '3.0.0';
+const version = '3.1.0';
 const versionFlag = 'version';
 final _portOnlyRegExp = RegExp(r'^:\d+$');
 
diff --git a/pubspec.lock b/pubspec.lock
index 4cfd416..fc7b803 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -5,42 +5,42 @@ packages:
     dependency: transitive
     description:
       name: _fe_analyzer_shared
-      sha256: "8c7478991c7bbde2c1e18034ac697723176a5d3e7e0ca06c7f9aed69b6f388d7"
+      sha256: eb376e9acf6938204f90eb3b1f00b578640d3188b4c8a8ec054f9f479af8d051
       url: "https://pub.dev"
     source: hosted
-    version: "51.0.0"
+    version: "64.0.0"
   analyzer:
     dependency: transitive
     description:
       name: analyzer
-      sha256: "120fe7ce25377ba616bb210e7584983b163861f45d6ec446744d507e3943881b"
+      sha256: "69f54f967773f6c26c7dcb13e93d7ccee8b17a641689da39e878d5cf13b06893"
       url: "https://pub.dev"
     source: hosted
-    version: "5.3.1"
+    version: "6.2.0"
   archive:
     dependency: transitive
     description:
       name: archive
-      sha256: ed7cc591a948744994714375caf9a2ce89e1d82e8243997c8a2994d57181c212
+      sha256: "49b1fad315e57ab0bbc15bcbb874e83116a1d78f77ebd500a4af6c9407d6b28e"
       url: "https://pub.dev"
     source: hosted
-    version: "3.3.5"
+    version: "3.3.8"
   args:
     dependency: "direct main"
     description:
       name: args
-      sha256: b003c3098049a51720352d219b0bb5f219b60fbfb68e7a4748139a06a5676515
+      sha256: eef6c46b622e0494a36c5a12d10d77fb4e855501a91c1b9ef9339326e58f0596
       url: "https://pub.dev"
     source: hosted
-    version: "2.3.1"
+    version: "2.4.2"
   async:
     dependency: transitive
     description:
       name: async
-      sha256: bfe67ef28df125b7dddcea62755991f807aa39a2492a23e1550161692950bbe0
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
       url: "https://pub.dev"
     source: hosted
-    version: "2.10.0"
+    version: "2.11.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -69,34 +69,34 @@ packages:
     dependency: transitive
     description:
       name: checked_yaml
-      sha256: dd007e4fb8270916820a0d66e24f619266b60773cddd082c6439341645af2659
+      sha256: feb6bed21949061731a7a75fc5d2aa727cf160b91af9a3e464c5e3a32e28b5ff
       url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.3"
   cli_pkg:
     dependency: "direct dev"
     description:
       name: cli_pkg
-      sha256: ca6d4a3b57fbc1bace95ca8090ca7e577c29f616d99634cd17fd1af2f983213f
+      sha256: "009e19944bbfb07c3b97f2f8c9941aa01ca70a7d3d0018e813303b4c3905c9b9"
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.9"
+    version: "2.5.0"
   cli_util:
     dependency: transitive
     description:
       name: cli_util
-      sha256: "66f86e916d285c1a93d3b79587d94bd71984a66aac4ff74e524cfa7877f1395c"
+      sha256: b8db3080e59b2503ca9e7922c3df2072cf13992354d5e944074ffa836fba43b7
       url: "https://pub.dev"
     source: hosted
-    version: "0.3.5"
+    version: "0.4.0"
   collection:
     dependency: transitive
     description:
       name: collection
-      sha256: cfc915e6923fe5ce6e153b0723c753045de46de1b4d63771530504004a45fae0
+      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
       url: "https://pub.dev"
     source: hosted
-    version: "1.17.0"
+    version: "1.18.0"
   console:
     dependency: "direct main"
     description:
@@ -117,26 +117,26 @@ packages:
     dependency: transitive
     description:
       name: coverage
-      sha256: d2494157c32b303f47dedee955b1479f2979c4ff66934eb7c0def44fd9e0267a
+      sha256: "2fb815080e44a09b85e0f2ca8a820b15053982b2e714b59267719e8a9ff17097"
       url: "https://pub.dev"
     source: hosted
-    version: "1.6.1"
+    version: "1.6.3"
   crypto:
     dependency: transitive
     description:
       name: crypto
-      sha256: aa274aa7774f8964e4f4f38cc994db7b6158dd36e9187aaceaddc994b35c6c67
+      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.2"
+    version: "3.0.3"
   csslib:
     dependency: "direct main"
     description:
       name: csslib
-      sha256: b36c7f7e24c0bdf1bf9a3da461c837d1de64b9f8beb190c9011d8c72a3dfd745
+      sha256: "706b5707578e0c1b4b7550f64078f0a0f19dec3f50a178ffae7006b0a9ca58fb"
       url: "https://pub.dev"
     source: hosted
-    version: "0.17.2"
+    version: "1.0.0"
   dhttpd:
     dependency: "direct dev"
     description:
@@ -149,10 +149,10 @@ packages:
     dependency: transitive
     description:
       name: file
-      sha256: "1b92bec4fc2a72f59a8e15af5f52cd441e4a7860b49499d69dfa817af20e925d"
+      sha256: "5fc22d7c25582e38ad9a8515372cd9a93834027aacf1801cf01164dac0ffa08c"
       url: "https://pub.dev"
     source: hosted
-    version: "6.1.4"
+    version: "7.0.0"
   frontend_server_client:
     dependency: transitive
     description:
@@ -165,34 +165,34 @@ packages:
     dependency: "direct main"
     description:
       name: glob
-      sha256: "4515b5b6ddb505ebdd242a5f2cc5d22d3d6a80013789debfbda7777f47ea308c"
+      sha256: "0e7014b3b7d4dac1ca4d6114f82bf1782ee86745b9b42a92c9289c23d8a0ab63"
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
   grinder:
     dependency: "direct dev"
     description:
       name: grinder
-      sha256: b24948a441fc65d07bc8b219d7ee8d6cc0af4cdb13823e0d3be6d848eb787b04
+      sha256: "48495acdb3df702c55c952c6536faf11631b8401a292eb0d182ef332fc568b56"
       url: "https://pub.dev"
     source: hosted
-    version: "0.9.2"
+    version: "0.9.4"
   html:
     dependency: "direct main"
     description:
       name: html
-      sha256: d9793e10dbe0e6c364f4c59bf3e01fb33a9b2a674bc7a1081693dba0614b6269
+      sha256: "3a7812d5bcd2894edf53dfaf8cd640876cf6cef50a8f238745c8b8120ea74d3a"
       url: "https://pub.dev"
     source: hosted
-    version: "0.15.1"
+    version: "0.15.4"
   http:
     dependency: transitive
     description:
       name: http
-      sha256: "6aa2946395183537c8b880962d935877325d6a09a2867c3970c05c0fed6ac482"
+      sha256: "759d1a329847dd0f39226c688d3e06a6b8679668e350e2891a6474f8b4bb8525"
       url: "https://pub.dev"
     source: hosted
-    version: "0.13.5"
+    version: "1.1.0"
   http_multi_server:
     dependency: transitive
     description:
@@ -213,66 +213,66 @@ packages:
     dependency: transitive
     description:
       name: io
-      sha256: "0d4c73c3653ab85bf696d51a9657604c900a370549196a91f33e4c39af760852"
+      sha256: "2ec25704aba361659e10e3e5f5d672068d332fc8ac516421d483a11e5cbd061e"
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.3"
+    version: "1.0.4"
   js:
     dependency: transitive
     description:
       name: js
-      sha256: "323b7c70073cccf6b9b8d8b334be418a3293cfb612a560dc2737160a37bf61bd"
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
       url: "https://pub.dev"
     source: hosted
-    version: "0.6.6"
+    version: "0.6.7"
   json_annotation:
     dependency: transitive
     description:
       name: json_annotation
-      sha256: "3520fa844009431b5d4491a5a778603520cdc399ab3406332dcc50f93547258c"
+      sha256: b10a7b2ff83d83c777edba3c6a0f97045ddadd56c944e1a23a3fdf43a1bf4467
       url: "https://pub.dev"
     source: hosted
-    version: "4.7.0"
+    version: "4.8.1"
   lints:
     dependency: "direct dev"
     description:
       name: lints
-      sha256: "5e4a9cd06d447758280a8ac2405101e0e2094d2a1dbdd3756aec3fe7775ba593"
+      sha256: "0a217c6c989d21039f1498c3ed9f3ed71b354e69873f13a8dfc3c9fe76f1b452"
       url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
+    version: "2.1.1"
   logging:
     dependency: transitive
     description:
       name: logging
-      sha256: c0bbfe94d46aedf9b8b3e695cf3bd48c8e14b35e3b2c639e0aa7755d589ba946
+      sha256: "623a88c9594aa774443aa3eb2d41807a48486b5613e67599fb4c41c0ad47c340"
       url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      sha256: c94db23593b89766cda57aab9ac311e3616cf87c6fa4e9749df032f66f30dcb8
+      sha256: "1803e76e6653768d64ed8ff2e1e67bea3ad4b923eb5c56a295c3e634bad5960e"
       url: "https://pub.dev"
     source: hosted
-    version: "0.12.14"
+    version: "0.12.16"
   meta:
     dependency: "direct main"
     description:
       name: meta
-      sha256: "6c268b42ed578a53088d834796959e4a1814b5e9e164f147f580a386e5decf42"
+      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
       url: "https://pub.dev"
     source: hosted
-    version: "1.8.0"
+    version: "1.9.1"
   mime:
     dependency: transitive
     description:
       name: mime
-      sha256: "52e38f7e1143ef39daf532117d6b8f8f617bf4bcd6044ed8c29040d20d269630"
+      sha256: e4ff8e8564c03f255408decd16e7899da1733852a9110a58fe6d1b817684a63e
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.3"
+    version: "1.0.4"
   node_interop:
     dependency: transitive
     description:
@@ -285,10 +285,10 @@ packages:
     dependency: transitive
     description:
       name: node_preamble
-      sha256: "8ebdbaa3b96d5285d068f80772390d27c21e1fa10fb2df6627b1b9415043608d"
+      sha256: "6e7eac89047ab8a8d26cf16127b5ed26de65209847630400f9aefd7cd5c730db"
       url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.2"
   package_config:
     dependency: transitive
     description:
@@ -309,18 +309,18 @@ packages:
     dependency: transitive
     description:
       name: petitparser
-      sha256: "49392a45ced973e8d94a85fdb21293fbb40ba805fc49f2965101ae748a3683b4"
+      sha256: eeb2d1428ee7f4170e2bd498827296a18d4e7fc462b71727d111c0ac7707cfa6
       url: "https://pub.dev"
     source: hosted
-    version: "5.1.0"
+    version: "6.0.1"
   pointycastle:
     dependency: transitive
     description:
       name: pointycastle
-      sha256: db7306cf0249f838d1a24af52b5a5887c5bf7f31d8bb4e827d071dc0939ad346
+      sha256: "7c1e5f0d23c9016c5bbd8b1473d0d3fb3fc851b876046039509e18e0c7485f2c"
       url: "https://pub.dev"
     source: hosted
-    version: "3.6.2"
+    version: "3.7.3"
   pool:
     dependency: transitive
     description:
@@ -333,58 +333,58 @@ packages:
     dependency: transitive
     description:
       name: pub_semver
-      sha256: "307de764d305289ff24ad257ad5c5793ce56d04947599ad68b3baa124105fc17"
+      sha256: "40d3ab1bbd474c4c2328c91e3a7df8c6dd629b79ece4c4bd04bee496a224fb0c"
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.3"
+    version: "2.1.4"
   pubspec_parse:
     dependency: transitive
     description:
       name: pubspec_parse
-      sha256: "75f6614d6dde2dc68948dffbaa4fe5dae32cd700eb9fb763fe11dfb45a3c4d0a"
+      sha256: c63b2876e58e194e4b0828fcb080ad0e06d051cb607a6be51a9e084f47cb9367
       url: "https://pub.dev"
     source: hosted
-    version: "1.2.1"
+    version: "1.2.3"
   retry:
     dependency: transitive
     description:
       name: retry
-      sha256: "45dfeebaf095b606fdb9dbfb4c114cc204449bc274783b452658365e03afdbab"
+      sha256: "822e118d5b3aafed083109c72d5f484c6dc66707885e07c0fbcb8b986bba7efc"
       url: "https://pub.dev"
     source: hosted
-    version: "3.1.0"
+    version: "3.1.2"
   shelf:
     dependency: transitive
     description:
       name: shelf
-      sha256: c24a96135a2ccd62c64b69315a14adc5c3419df63b4d7c05832a346fdb73682c
+      sha256: ad29c505aee705f41a4d8963641f91ac4cee3c8fad5947e033390a7bd8180fa4
       url: "https://pub.dev"
     source: hosted
-    version: "1.4.0"
+    version: "1.4.1"
   shelf_packages_handler:
     dependency: transitive
     description:
       name: shelf_packages_handler
-      sha256: aef74dc9195746a384843102142ab65b6a4735bb3beea791e63527b88cc83306
+      sha256: "89f967eca29607c933ba9571d838be31d67f53f6e4ee15147d5dc2934fee1b1e"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.1"
+    version: "3.0.2"
   shelf_static:
     dependency: transitive
     description:
       name: shelf_static
-      sha256: e792b76b96a36d4a41b819da593aff4bdd413576b3ba6150df5d8d9996d2e74c
+      sha256: a41d3f53c4adf0f57480578c1d61d90342cd617de7fc8077b1304643c2d85c1e
       url: "https://pub.dev"
     source: hosted
-    version: "1.1.1"
+    version: "1.1.2"
   shelf_web_socket:
     dependency: transitive
     description:
       name: shelf_web_socket
-      sha256: a988c0e8d8ffbdb8a28aa7ec8e449c260f3deb808781fe1284d22c5bba7156e8
+      sha256: "9ca081be41c60190ebcb4766b2486a7d50261db7bd0f5d9615f2d653637a84c1"
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.3"
+    version: "1.0.4"
   source_map_stack_trace:
     dependency: transitive
     description:
@@ -397,34 +397,34 @@ packages:
     dependency: transitive
     description:
       name: source_maps
-      sha256: "490098075234dcedb83c5d949b4c93dad5e6b7702748de000be2b57b8e6b2427"
+      sha256: "708b3f6b97248e5781f493b765c3337db11c5d2c81c3094f10904bfa8004c703"
       url: "https://pub.dev"
     source: hosted
-    version: "0.10.11"
+    version: "0.10.12"
   source_span:
     dependency: "direct main"
     description:
       name: source_span
-      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
       url: "https://pub.dev"
     source: hosted
-    version: "1.9.1"
+    version: "1.10.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
       url: "https://pub.dev"
     source: hosted
-    version: "1.11.0"
+    version: "1.11.1"
   stream_channel:
     dependency: "direct main"
     description:
       name: stream_channel
-      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
   string_scanner:
     dependency: transitive
     description:
@@ -445,42 +445,42 @@ packages:
     dependency: "direct dev"
     description:
       name: test
-      sha256: "98403d1090ac0aa9e33dfc8bf45cc2e0c1d5c58d7cb832cee1e50bf14f37961d"
+      sha256: "9b0dd8e36af4a5b1569029949d50a52cb2a2a2fdaa20cebb96e6603b9ae241f9"
       url: "https://pub.dev"
     source: hosted
-    version: "1.22.1"
+    version: "1.24.6"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      sha256: c9282698e2982b6c3817037554e52f99d4daba493e8028f8112a83d68ccd0b12
+      sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
       url: "https://pub.dev"
     source: hosted
-    version: "0.4.17"
+    version: "0.6.1"
   test_core:
     dependency: transitive
     description:
       name: test_core
-      sha256: c9e4661a5e6285b795d47ba27957ed8b6f980fc020e98b218e276e88aff02168
+      sha256: "4bef837e56375537055fdbbbf6dd458b1859881f4c7e6da936158f77d61ab265"
       url: "https://pub.dev"
     source: hosted
-    version: "0.4.21"
+    version: "0.5.6"
   test_process:
     dependency: transitive
     description:
       name: test_process
-      sha256: b0e6702f58272d459d5b80b88696483f86eac230dab05ecf73d0662e305d005e
+      sha256: "217f19b538926e4922bdb2a01410100ec4e3beb4cc48eae5ae6b20037b07bbd6"
       url: "https://pub.dev"
     source: hosted
-    version: "2.0.3"
+    version: "2.1.0"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
-      sha256: "26f87ade979c47a150c9eaab93ccd2bebe70a27dc0b4b29517f2904f04eb11a5"
+      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
       url: "https://pub.dev"
     source: hosted
-    version: "1.3.1"
+    version: "1.3.2"
   vector_math:
     dependency: transitive
     description:
@@ -493,49 +493,49 @@ packages:
     dependency: transitive
     description:
       name: vm_service
-      sha256: e7fb6c2282f7631712b69c19d1bff82f3767eea33a2321c14fa59ad67ea391c7
+      sha256: c538be99af830f478718b51630ec1b6bee5e74e52c8a802d328d9e71d35d2583
       url: "https://pub.dev"
     source: hosted
-    version: "9.4.0"
+    version: "11.10.0"
   watcher:
     dependency: transitive
     description:
       name: watcher
-      sha256: "6a7f46926b01ce81bfc339da6a7f20afbe7733eff9846f6d6a5466aa4c6667c0"
+      sha256: "3d2ad6751b3c16cf07c7fca317a1413b3f26530319181b37e3b9039b84fc01d8"
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.2"
+    version: "1.1.0"
   web_socket_channel:
     dependency: transitive
     description:
       name: web_socket_channel
-      sha256: "3a969ddcc204a3e34e863d204b29c0752716f78b6f9cc8235083208d268a4ccd"
+      sha256: d88238e5eac9a42bb43ca4e721edba3c08c6354d4a53063afaa568516217621b
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.0"
+    version: "2.4.0"
   webkit_inspection_protocol:
     dependency: transitive
     description:
       name: webkit_inspection_protocol
-      sha256: "67d3a8b6c79e1987d19d848b0892e582dbb0c66c57cc1fef58a177dd2aa2823d"
+      sha256: "87d3f2333bb240704cd3f1c6b5b7acd8a10e7f0bc28c28dcf14e782014f4a572"
       url: "https://pub.dev"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   xml:
     dependency: transitive
     description:
       name: xml
-      sha256: "80d494c09849dc3f899d227a78c30c5b949b985ededf884cb3f3bcd39f4b447a"
+      sha256: af5e77e9b83f2f4adc5d3f0a4ece1c7f45a2467b695c2540381bac793e34e556
       url: "https://pub.dev"
     source: hosted
-    version: "5.4.1"
+    version: "6.4.2"
   yaml:
     dependency: transitive
     description:
       name: yaml
-      sha256: "23812a9b125b48d4007117254bca50abb6c712352927eece9e155207b1db2370"
+      sha256: "75769501ea3489fca56601ff33454fe45507ea3bfb014161abc3b43ae25989d5"
       url: "https://pub.dev"
     source: hosted
-    version: "3.1.1"
+    version: "3.1.2"
 sdks:
-  dart: ">=2.18.0 <4.0.0"
+  dart: ">=3.0.0 <4.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 0612abc..b9f6a9c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: linkcheck
-version: 3.0.0 # Don't forget to update in lib/linkcheck.dart, too.
+version: 3.1.0 # Don't forget to update in lib/linkcheck.dart, too.
 
 description: >-
   A very fast link-checker. Crawls sites and checks integrity of links
@@ -8,25 +8,25 @@ description: >-
 repository: https://github.com/filiph/linkcheck
 
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: ^3.0.0
 
 dependencies:
-  args: ^2.2.0
+  args: ^2.4.0
   console: ^4.1.0
-  csslib: ^0.17.0
-  glob: ^2.1.0
-  html: ^0.15.0
-  meta: ^1.8.0
-  path: ^1.8.0
-  source_span: ^1.8.0
-  stream_channel: ^2.1.0
+  csslib: ^1.0.0
+  glob: ^2.1.2
+  html: ^0.15.4
+  meta: ^1.9.1
+  path: ^1.8.3
+  source_span: ^1.10.0
+  stream_channel: ^2.1.2
 
 dev_dependencies:
-  lints: ^2.0.1
+  lints: ^2.1.1
   dhttpd: ^4.0.0
-  test: ^1.22.1
-  cli_pkg: ^2.1.7
-  grinder: ^0.9.2
+  test: ^1.24.4
+  cli_pkg: ^2.5.0
+  grinder: ^0.9.4
 
 executables:
   linkcheck: linkcheck
diff --git a/tool/grind.dart b/tool/grind.dart
index 0a9803c..433c125 100644
--- a/tool/grind.dart
+++ b/tool/grind.dart
@@ -1,3 +1,5 @@
+// ignore_for_file: unreachable_from_main
+
 import 'package:cli_pkg/cli_pkg.dart' as pkg;
 import 'package:grinder/grinder.dart';