diff --git a/Chapter_01/pubspec.lock b/Chapter_01/pubspec.lock
index c9dcd72..a0cc53f 100644
--- a/Chapter_01/pubspec.lock
+++ b/Chapter_01/pubspec.lock
@@ -28,23 +28,27 @@ packages:
   code_transformers:
     description: code_transformers
     source: hosted
-    version: "0.2.5"
+    version: "0.2.7+2"
   collection:
     description: collection
     source: hosted
-    version: "0.9.1"
+    version: "0.9.4"
   csslib:
     description: csslib
     source: hosted
-    version: "0.11.0+4"
+    version: "0.12.0"
   di:
     description: di
     source: hosted
-    version: "3.3.3"
+    version: "3.3.4"
+  html:
+    description: html
+    source: hosted
+    version: "0.12.1+1"
   html5lib:
     description: html5lib
     source: hosted
-    version: "0.12.0"
+    version: "0.12.1"
   initialize:
     description: initialize
     source: hosted
@@ -52,15 +56,11 @@ packages:
   intl:
     description: intl
     source: hosted
-    version: "0.8.10+4"
+    version: "0.11.12"
   logging:
     description: logging
     source: hosted
-    version: "0.9.1+1"
-  meta:
-    description: meta
-    source: hosted
-    version: "0.8.8"
+    version: "0.9.3"
   observe:
     description: observe
     source: hosted
@@ -68,11 +68,15 @@ packages:
   path:
     description: path
     source: hosted
-    version: "1.3.3"
+    version: "1.3.4"
   perf_api:
     description: perf_api
     source: hosted
     version: "0.0.9"
+  petitparser:
+    description: petitparser
+    source: hosted
+    version: "1.3.7"
   pool:
     description: pool
     source: hosted
@@ -84,27 +88,27 @@ packages:
   smoke:
     description: smoke
     source: hosted
-    version: "0.3.1"
+    version: "0.3.2"
   source_maps:
     description: source_maps
     source: hosted
-    version: "0.10.0+1"
+    version: "0.10.0+2"
   source_span:
     description: source_span
     source: hosted
-    version: "1.0.0"
+    version: "1.1.2"
   stack_trace:
     description: stack_trace
     source: hosted
-    version: "0.9.3+1"
+    version: "1.2.4"
   utf:
     description: utf
     source: hosted
-    version: "0.9.0"
+    version: "0.9.0+2"
   watcher:
     description: watcher
     source: hosted
-    version: "0.9.4"
+    version: "0.9.5"
   web_components:
     description: web_components
     source: hosted
diff --git a/Chapter_01/pubspec.yaml b/Chapter_01/pubspec.yaml
index 5642ea4..35d04f9 100644
--- a/Chapter_01/pubspec.yaml
+++ b/Chapter_01/pubspec.yaml
@@ -2,7 +2,7 @@ name: tutorial
 version: 1.0.0
 dependencies:
   angular: "1.1.0"
-  web_components: ">=0.10.0 <0.11.0"
+  web_components: "0.10.1"
   browser: ">=0.10.0+2 <0.11.0"
 transformers:
 - angular
diff --git a/Chapter_02/pubspec.yaml b/Chapter_02/pubspec.yaml
index 26585d3..17aa22b 100644
--- a/Chapter_02/pubspec.yaml
+++ b/Chapter_02/pubspec.yaml
@@ -2,7 +2,7 @@ name: tutorial
 version: 1.0.0
 dependencies:
   angular: "1.1.0"
-  web_components: ">=0.10.0 <0.11.0"
+  web_components: "0.10.1"
   browser: ">=0.10.0+2 <0.11.0"
 dev_dependencies:
   unittest: ">=0.11.0+5 <0.12.0"
diff --git a/Chapter_03/pubspec.yaml b/Chapter_03/pubspec.yaml
index c02c043..d8359c4 100644
--- a/Chapter_03/pubspec.yaml
+++ b/Chapter_03/pubspec.yaml
@@ -2,7 +2,7 @@ name: tutorial
 version: 1.0.0
 dependencies:
   angular: "1.1.0"
-  web_components: ">=0.10.0 <0.11.0"
+  web_components: "0.10.1"
   browser: ">=0.10.0+2 <0.11.0"
 dev_dependencies:
   unittest: ">=0.11.0+5 <0.12.0"
diff --git a/Chapter_04/pubspec.yaml b/Chapter_04/pubspec.yaml
index 7cf01bd..e2ecb99 100644
--- a/Chapter_04/pubspec.yaml
+++ b/Chapter_04/pubspec.yaml
@@ -2,7 +2,7 @@ name: tutorial
 version: 1.0.0
 dependencies:
   angular: "1.1.0"
-  web_components: ">=0.10.0 <0.11.0"
+  web_components: "0.10.1"
   browser: ">=0.10.0+2 <0.11.0"
 dev_dependencies:
   unittest: ">=0.11.0+5 <0.12.0"
diff --git a/Chapter_05/pubspec.yaml b/Chapter_05/pubspec.yaml
index 7cf01bd..e2ecb99 100644
--- a/Chapter_05/pubspec.yaml
+++ b/Chapter_05/pubspec.yaml
@@ -2,7 +2,7 @@ name: tutorial
 version: 1.0.0
 dependencies:
   angular: "1.1.0"
-  web_components: ">=0.10.0 <0.11.0"
+  web_components: "0.10.1"
   browser: ">=0.10.0+2 <0.11.0"
 dev_dependencies:
   unittest: ">=0.11.0+5 <0.12.0"
diff --git a/Chapter_06/pubspec.yaml b/Chapter_06/pubspec.yaml
index 7f38787..99262a1 100644
--- a/Chapter_06/pubspec.yaml
+++ b/Chapter_06/pubspec.yaml
@@ -2,7 +2,7 @@ name: tutorial
 version: 1.0.0
 dependencies:
   angular: "1.1.0"
-  web_components: ">=0.10.0 <0.11.0"
+  web_components: "0.10.1"
   browser: any
   http_server: ">=0.9.3 <0.10.0"
 dev_dependencies: