diff --git a/.analysis_options b/.analysis_options
new file mode 100644
index 0000000..a10d4c5
--- /dev/null
+++ b/.analysis_options
@@ -0,0 +1,2 @@
+analyzer:
+  strong-mode: true
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 320bde6..3f3bda0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 1.1.0
+
+* `Hmac` and `Hash` now extend the new `ChunkedConverter` class from
+  `dart:convert`.
+
+* Fix all strong mode warnings.
+
 ## 1.0.0
 
 * All APIs that were deprecated in 0.9.2 have been removed. No new APIs have
diff --git a/lib/src/hash.dart b/lib/src/hash.dart
index fad44ae..4049025 100644
--- a/lib/src/hash.dart
+++ b/lib/src/hash.dart
@@ -12,7 +12,8 @@
 /// Every hash is a converter that takes a list of ints and returns a single
 /// digest. When used in chunked mode, it will only ever add one digest to the
 /// inner [Sink].
-abstract class Hash extends Converter<List<int>, Digest> {
+abstract class Hash
+    extends ChunkedConverter<List<int>, Digest, List<int>, Digest> {
   /// The internal block size of the hash in bytes.
   ///
   /// This is exposed for use by the [Hmac] class, which needs to know the block
diff --git a/lib/src/hmac.dart b/lib/src/hmac.dart
index f5bf6bf..2b38c1a 100644
--- a/lib/src/hmac.dart
+++ b/lib/src/hmac.dart
@@ -15,7 +15,7 @@
 ///
 /// HMAC allows messages to be cryptographically authenticated using any
 /// iterated cryptographic hash function.
-class Hmac extends Converter<List<int>, Digest> {
+class Hmac extends ChunkedConverter<List<int>, Digest, List<int>, Digest> {
   /// The hash function used to compute the authentication digest.
   final Hash _hash;
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 4141c03..1351d12 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,10 +1,10 @@
 name: crypto
-version: 1.0.0
+version: 1.1.0
 author: Dart Team <misc@dartlang.org>
 description: Library of cryptographic functions.
 homepage: https://www.github.com/dart-lang/crypto
 environment:
-  sdk: '>=1.8.0 <2.0.0'
+  sdk: '>=1.16.0-dev.5.0 <2.0.0'
 dependencies:
   collection: '^1.0.0'
   convert: '^1.0.0'