diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f337524c5..ded16a95d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs :
     strategy :
       fail-fast : false
       matrix :
-        kotlin-version : [ 1.8.21 ]
+        kotlin-version : [ 1.8.22, 1.9.0 ]
 
     steps :
       - uses : actions/checkout@v3
@@ -135,12 +135,19 @@ jobs :
           java-version : '11'
           check-latest : true
 
-      - name : Publish Snapshots
+      - name : Publish Snapshots 1.9
         run : ./gradlew clean publish --no-build-cache --no-daemon --stacktrace --no-parallel && cd gradle-plugin && ./gradlew clean publish --no-build-cache --no-daemon --stacktrace && cd ..
         env :
           ORG_GRADLE_PROJECT_mavenCentralUsername : ${{ secrets.SONATYPE_NEXUS_USERNAME }}
           ORG_GRADLE_PROJECT_mavenCentralPassword : ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
 
+      # TODO: Remove when we drop Kotlin 1.8 support
+      - name : Publish Snapshots 1.8
+        run : ./gradlew clean publish --no-build-cache --no-daemon --stacktrace --no-parallel -Doverride_kotlin=1.8.22 -PVERSION_NAME=2.4.7-1-8-SNAPSHOT && cd gradle-plugin && ./gradlew clean publish --no-build-cache --no-daemon --stacktrace -Doverride_kotlin=1.8.22 -PVERSION_NAME=2.4.7-1-8-SNAPSHOT && cd ..
+        env :
+          ORG_GRADLE_PROJECT_mavenCentralUsername : ${{ secrets.SONATYPE_NEXUS_USERNAME }}
+          ORG_GRADLE_PROJECT_mavenCentralPassword : ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
+
   build-gradle-plugin :
     runs-on : ubuntu-latest
     defaults :
@@ -155,7 +162,7 @@ jobs :
       # solution.
       fail-fast : false
       matrix :
-        kotlin-version : [ 1.8.21 ]
+        kotlin-version : [ 1.8.22, 1.9.0 ]
         agp-version : [ 7.1.1, 7.2.0, 7.3.1 ]
 
     steps :
@@ -206,7 +213,7 @@ jobs :
       # solution.
       fail-fast : false
       matrix :
-        kotlin-version : [ 1.8.21 ]
+        kotlin-version : [ 1.8.22, 1.9.0 ]
 
     steps :
       - uses : actions/checkout@v3
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 1c1f89be6..a94f9cd20 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -20,7 +20,7 @@ jobs :
           java-version : '11'
           check-latest : true
 
-      - name : Publish Release
+      - name : Publish Release 1.9
         run : ./gradlew clean publish --no-build-cache --no-daemon --stacktrace --no-parallel && cd gradle-plugin && ./gradlew clean publish --no-build-cache --no-daemon --stacktrace && cd ..
         env :
           ORG_GRADLE_PROJECT_mavenCentralUsername : ${{ secrets.SONATYPE_NEXUS_USERNAME }}
@@ -28,6 +28,15 @@ jobs :
           ORG_GRADLE_PROJECT_signingInMemoryKey : ${{ secrets.ARTIFACT_SIGNING_PRIVATE_KEY }}
           ORG_GRADLE_PROJECT_signingInMemoryKeyPassword : ''
 
+      # TODO: Remove when we drop Kotlin 1.8 support
+      - name : Publish Release 1.8
+        run : ./gradlew clean publish --no-build-cache --no-daemon --stacktrace --no-parallel -Doverride_kotlin=1.8.22 -PVERSION_NAME=2.4.7-1-8 && cd gradle-plugin && ./gradlew clean publish --no-build-cache --no-daemon --stacktrace -Doverride_kotlin=1.8.22 -PVERSION_NAME=2.4.7-1-8 && cd ..
+        env :
+          ORG_GRADLE_PROJECT_mavenCentralUsername : ${{ secrets.SONATYPE_NEXUS_USERNAME }}
+          ORG_GRADLE_PROJECT_mavenCentralPassword : ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
+          ORG_GRADLE_PROJECT_signingInMemoryKey : ${{ secrets.ARTIFACT_SIGNING_PRIVATE_KEY }}
+          ORG_GRADLE_PROJECT_signingInMemoryKeyPassword : ''
+
       - name : Extract release notes
         id : release_notes
         uses : ffurrer2/extract-release-notes@v1
diff --git a/build.gradle b/build.gradle
index 8deefc0af..db5cf787f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -27,7 +27,6 @@ String kotlinVersion = libs.versions.kotlin.get()
 
 ext {
   ci = isCi
-  kotlinPreview = !kotlinVersion.startsWith('1.8.21')
   fullTestRun = libs.versions.config.fullTestRun.get().toBoolean()
   warningsAsErrors = isCi
 }
diff --git a/compiler/generate_build_properties.gradle b/compiler/generate_build_properties.gradle
index fa9731282..d760c1001 100644
--- a/compiler/generate_build_properties.gradle
+++ b/compiler/generate_build_properties.gradle
@@ -9,7 +9,6 @@ def generateBuildProperties = project.tasks.register('generateBuildProperties')
 
   inputs.property 'fullTestRun', libs.versions.config.fullTestRun.get()
   inputs.property 'kotlinVersion', libs.versions.kotlin.get()
-  inputs.property 'kotlinPreview', rootProject.ext.kotlinPreview
   inputs.property 'warningsAsErrors', rootProject.ext.warningsAsErrors
 
   outputs.file buildPropertiesFile
@@ -18,8 +17,6 @@ def generateBuildProperties = project.tasks.register('generateBuildProperties')
     buildPropertiesFile.parentFile.mkdirs()
     buildPropertiesFile.write """\
       package com.squareup.anvil.compiler
-      
-      internal const val KOTLIN_PREVIEW = ${rootProject.ext.kotlinPreview}
 
       internal const val WARNINGS_AS_ERRORS = ${rootProject.ext.warningsAsErrors}
      
diff --git a/gradle.properties b/gradle.properties
index c62f29271..15631e118 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,6 @@
 GROUP=com.squareup.anvil
 
+# When updating this, make sure to also update the parallel release versions in release.yaml & ci.yml
 VERSION_NAME=2.4.7-SNAPSHOT
 
 POM_DESCRIPTION=A Kotlin compiler plugin to make dependency injection with Dagger 2 easier by automatically merging Dagger modules and component interfaces.
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index eb91478cc..c6ca50c8f 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -9,12 +9,13 @@
 
 [versions]
 agp = "7.1.0"
-autoService = "1.0.1"
-autoValue = "1.10"
+autoService = "1.1.1"
+autoValue = "1.10.1"
 dagger = "2.46.1"
+dokka = "1.8.20"
 espresso = "3.5.1"
 gradlePublish = "0.15.0"
-kotlin = "1.8.21"
+kotlin = "1.9.0"
 ktlint = "0.41.0"
 ktlintPlugin = "10.2.0"
 mavenPublish = "0.18.0"
@@ -34,7 +35,7 @@ agp-application = { id = "com.android.application", version.ref = "agp" }
 agp-library = { id = "com.android.library", version.ref = "agp" }
 gradlePublish = { id = "com.gradle.plugin-publish", version.ref = "gradlePublish" }
 kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
-kotlin-dokka = { id = "org.jetbrains.dokka", version = "1.7.20" }
+kotlin-dokka = { id = "org.jetbrains.dokka", version.ref = "dokka" }
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 kotlin-kapt = { id = "org.jetbrains.kotlin.kapt", version.ref = "kotlin" }
 kotlin-multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }
@@ -70,10 +71,10 @@ junit = "junit:junit:4.13"
 kotlin-annotationProcessingEmbeddable = { module = "org.jetbrains.kotlin:kotlin-annotation-processing-embeddable", version.ref = "kotlin" }
 kotlin-compileTesting = "dev.zacsweers.kctfork:core:0.2.0"
 kotlin-compiler = { module = "org.jetbrains.kotlin:kotlin-compiler-embeddable", version.ref = "kotlin" }
-kotlin-dokka = "org.jetbrains.dokka:dokka-gradle-plugin:1.7.20"
+kotlin-dokka = { module = "org.jetbrains.dokka:dokka-gradle-plugin", version.ref = "dokka" }
 kotlin-gradlePlugin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }
 kotlin-gradlePluginApi = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin-api", version.ref = "kotlin" }
-kotlin-metadata = "org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.6.0"
+kotlin-metadata = "org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.6.2"
 kotlin-reflect = { module = "org.jetbrains.kotlin:kotlin-reflect", version.ref = "kotlin" }
 kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test-junit", version.ref = "kotlin" }