diff --git a/CHANGELOG.md b/CHANGELOG.md
index 43f73e5..660257d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,49 @@
 Change Log
 ==========
 
+## Version 1.9.0
+
+_2018-10-29_
+
+ * **This release requires kotlin-reflect or moshi-kotlin-codegen for all Kotlin classes.** 
+ 
+   Previously Moshi wouldn't differentiate between Kotlin classes and Java classes if Kotlin was
+   not configured. This caused bad runtime behavior such as putting null into non-nullable fields!
+   If you attempt to create an adapter for a Kotlin type, Moshi will throw an
+   `IllegalArgumentException`.
+   
+   Fix this with either the reflection adapter or the codegen annotation processor.  
+
+ * New: Change how Moshi's generated adapters call constructors. Previous generated code used a 
+   combination of the constructor and `copy()` method to set properties that have default values.
+   With this update we call the same synthetic constructor that Kotlin uses. This is less surprising 
+   though it requires us to generate some tricky code.
+ * New: Make `Rfc3339DateJsonAdapter` null-safe. Previously Moshi would refuse to decode null dates.
+   Restore that behavior by explicitly forbidding nulls with `Rfc3339DateJsonAdapter().nonNull()`.
+ * New: Require Kotlin 1.3.50 or newer.
+ * New: `JsonWriter.valueSink()` streams JSON-formatted data inline. Use this to do basic includes
+   of raw JSON within a streamed document.
+ * New: Support Gradle incremental processing in code gen.
+ * New: Improve error messages. This includes better errors when field names and JSON names
+   disagree, and when failing on an unknown field.
+ * New: Support default values in `PolymorphicJsonAdapterFactory`.
+ * New: Permit multiple labels for each subtype in `PolymorphicJsonAdapterFactory`. The first label
+   is used when writing an object to JSON.
+ * New: Forbid automatic encoding of platform classes in `kotlinx`. As with `java.*`, `android.*`,
+   and `kotlin.*` Moshi wants you to specify how to encode platform types.
+ * New: `@JsonClass(generator=...)` makes it possible for third-party libraries to provide generated
+   adapters when Moshi's default adapters are insufficient.
+ * Fix: Simplify wildcard types like `List<? extends Number>` to their base types `List<Number>`
+   when finding type adapters. This is especially useful with Kotlin where wildcards may be added
+   automatically.
+ * Fix: Use the correct name when the `@Json` annotation uses field targeting like `@field:Json`.
+ * Fix: Support multiple transient properties in `KotlinJsonAdapter`.
+ * Fix: Don't explode attempting to resolve self-referential type variables like in
+   `Comparable<T extends Comparable<T>>`.
+ * Fix: Don't infinite loop on `skipValue()` at the end an object or array. Also disallow calling
+   `skipValue()` at the end of a document.
+
+
 ## Version 1.8.0
 
 _2018-11-09_
diff --git a/README.md b/README.md
index 91618bc..33679ca 100644
--- a/README.md
+++ b/README.md
@@ -533,12 +533,12 @@ The reflection adapter requires the following additional dependency:
 <dependency>
   <groupId>com.squareup.moshi</groupId>
   <artifactId>moshi-kotlin</artifactId>
-  <version>1.8.0</version>
+  <version>1.9.0</version>
 </dependency>
 ```
 
 ```kotlin
-implementation("com.squareup.moshi:moshi-kotlin:1.8.0")
+implementation("com.squareup.moshi:moshi-kotlin:1.9.0")
 ```
 
 Note that the reflection adapter transitively depends on the `kotlin-reflect` library which is a
@@ -568,13 +568,13 @@ add the following to your build to enable the annotation processor:
 <dependency>
   <groupId>com.squareup.moshi</groupId>
   <artifactId>moshi-kotlin-codegen</artifactId>
-  <version>1.8.0</version>
+  <version>1.9.0</version>
   <scope>provided</scope>
 </dependency>
 ```
 
 ```kotlin
-kapt("com.squareup.moshi:moshi-kotlin-codegen:1.8.0")
+kapt("com.squareup.moshi:moshi-kotlin-codegen:1.9.0")
 ```
 
 You must also have the `kotlin-stdlib` dependency on the classpath during compilation in order for
@@ -600,12 +600,12 @@ Download [the latest JAR][dl] or depend via Maven:
 <dependency>
   <groupId>com.squareup.moshi</groupId>
   <artifactId>moshi</artifactId>
-  <version>1.8.0</version>
+  <version>1.9.0</version>
 </dependency>
 ```
 or Gradle:
 ```kotlin
-implementation("com.squareup.moshi:moshi:1.8.0")
+implementation("com.squareup.moshi:moshi:1.9.0")
 ```
 
 Snapshots of the development version are available in [Sonatype's `snapshots` repository][snap].