diff --git a/pubspec.lock b/pubspec.lock
index d6475db7..9c39832e 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.35.3"
+    version: "0.35.4"
   archive:
     dependency: transitive
     description:
@@ -71,13 +71,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.6"
-  csslib:
-    dependency: transitive
-    description:
-      name: csslib
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.14.6"
   dart_config:
     dependency: transitive
     description:
@@ -150,7 +143,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.13"
+    version: "0.1.14"
   fuchsia_remote_debug_protocol:
     dependency: transitive
     description: flutter
@@ -163,20 +156,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.7"
-  html:
-    dependency: transitive
-    description:
-      name: html
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.13.3+3"
   http:
     dependency: "direct main"
     description:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.0+1"
+    version: "0.12.0+2"
   http_multi_server:
     dependency: transitive
     description:
@@ -232,7 +218,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.13"
+    version: "0.3.14"
   launch_review:
     dependency: "direct main"
     description:
@@ -240,13 +226,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.1"
-  logging:
-    dependency: transitive
-    description:
-      name: logging
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.11.3+2"
   matcher:
     dependency: transitive
     description:
@@ -316,14 +295,14 @@ packages:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.4.0"
+    version: "1.5.0"
   petitparser:
     dependency: transitive
     description:
       name: petitparser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.1"
+    version: "2.2.1"
   platform:
     dependency: transitive
     description:
@@ -331,13 +310,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.2.0"
-  plugin:
-    dependency: transitive
-    description:
-      name: plugin
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.0+3"
   pool:
     dependency: transitive
     description:
@@ -386,7 +358,7 @@ packages:
       name: shelf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.7.4"
+    version: "0.7.5"
   shelf_packages_handler:
     dependency: transitive
     description:
@@ -407,7 +379,7 @@ packages:
       name: shelf_web_socket
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.2+4"
+    version: "0.2.2+5"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -433,7 +405,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.5.4"
+    version: "1.5.5"
   stack_trace:
     dependency: transitive
     description:
@@ -496,14 +468,7 @@ packages:
       name: url_launcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.0.1"
-  utf:
-    dependency: transitive
-    description:
-      name: utf
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.9.0+5"
+    version: "5.0.2"
   uuid:
     dependency: "direct main"
     description:
@@ -545,7 +510,7 @@ packages:
       name: xml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.3.1"
+    version: "3.4.1"
   yaml:
     dependency: "direct main"
     description:
@@ -554,5 +519,5 @@ packages:
     source: hosted
     version: "2.1.15"
 sdks:
-  dart: ">=2.1.0 <3.0.0"
+  dart: ">=2.2.0 <3.0.0"
   flutter: ">=0.5.6 <2.0.0"