diff --git a/.github/workflows/AndroidCIWithGmd.yaml b/.github/workflows/AndroidCIWithGmd.yaml
index 44f8141f6..1c1206ed4 100644
--- a/.github/workflows/AndroidCIWithGmd.yaml
+++ b/.github/workflows/AndroidCIWithGmd.yaml
@@ -18,7 +18,7 @@ jobs:
       - uses: actions/setup-java@v3
         with:
           distribution: 'zulu'
-          java-version: '11'
+          java-version: 17
       - uses: actions/checkout@v3
 
       - name: Setup Android SDK
diff --git a/.github/workflows/Build.yaml b/.github/workflows/Build.yaml
index 342714245..c15daea80 100644
--- a/.github/workflows/Build.yaml
+++ b/.github/workflows/Build.yaml
@@ -24,11 +24,11 @@ jobs:
       - name: Copy CI gradle.properties
         run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties        
 
-      - name: Set up JDK 11
+      - name: Set up JDK 17
         uses: actions/setup-java@v3
         with:
           distribution: 'zulu'
-          java-version: 11
+          java-version: 17
 
       - name: Setup Gradle
         uses: gradle/gradle-build-action@v2
@@ -73,11 +73,11 @@ jobs:
       - name: Copy CI gradle.properties
         run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties
 
-      - name: Set up JDK 11
+      - name: Set up JDK 17
         uses: actions/setup-java@v3
         with:
           distribution: 'zulu'
-          java-version: 11
+          java-version: 17
 
       - name: Setup Gradle
         uses: gradle/gradle-build-action@v2
diff --git a/.github/workflows/Release.yml b/.github/workflows/Release.yml
index 86f88a920..534e9d893 100644
--- a/.github/workflows/Release.yml
+++ b/.github/workflows/Release.yml
@@ -20,11 +20,11 @@ jobs:
       - name: Copy CI gradle.properties
         run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties
 
-      - name: Set up JDK 11
+      - name: Set up JDK 17
         uses: actions/setup-java@v3
         with:
           distribution: 'zulu'
-          java-version: 11
+          java-version: 17
 
       - name: Build app
         run: ./gradlew :app:assembleDemoRelease
diff --git a/build-logic/convention/build.gradle.kts b/build-logic/convention/build.gradle.kts
index 281434b87..5408b218a 100644
--- a/build-logic/convention/build.gradle.kts
+++ b/build-logic/convention/build.gradle.kts
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
 plugins {
     `kotlin-dsl`
 }
@@ -25,6 +27,12 @@ java {
     targetCompatibility = JavaVersion.VERSION_11
 }
 
+tasks.withType<KotlinCompile>().configureEach {
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_11.toString()
+    }
+}
+
 dependencies {
     compileOnly(libs.android.gradlePlugin)
     compileOnly(libs.firebase.crashlytics.gradle)
diff --git a/build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/AndroidCompose.kt b/build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/AndroidCompose.kt
index 4da997fc3..cdcc65a7f 100644
--- a/build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/AndroidCompose.kt
+++ b/build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/AndroidCompose.kt
@@ -17,10 +17,14 @@
 package com.google.samples.apps.nowinandroid
 
 import com.android.build.api.dsl.CommonExtension
+import org.gradle.api.JavaVersion
 import org.gradle.api.Project
 import org.gradle.api.artifacts.VersionCatalogsExtension
 import org.gradle.kotlin.dsl.dependencies
 import org.gradle.kotlin.dsl.getByType
+import org.gradle.kotlin.dsl.provideDelegate
+import org.gradle.kotlin.dsl.withType
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import java.io.File
 
 /**
@@ -40,16 +44,18 @@ internal fun Project.configureAndroidCompose(
             kotlinCompilerExtensionVersion = libs.findVersion("androidxComposeCompiler").get().toString()
         }
 
-        kotlinOptions {
-            freeCompilerArgs = freeCompilerArgs + buildComposeMetricsParameters()
-        }
-
         dependencies {
             val bom = libs.findLibrary("androidx-compose-bom").get()
             add("implementation", platform(bom))
             add("androidTestImplementation", platform(bom))
         }
     }
+
+    tasks.withType<KotlinCompile>().configureEach {
+        kotlinOptions {
+            freeCompilerArgs = freeCompilerArgs + buildComposeMetricsParameters()
+        }
+    }
 }
 
 private fun Project.buildComposeMetricsParameters(): List<String> {
diff --git a/build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/KotlinAndroid.kt b/build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/KotlinAndroid.kt
index da0cab531..bf510a2c4 100644
--- a/build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/KotlinAndroid.kt
+++ b/build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/KotlinAndroid.kt
@@ -24,7 +24,9 @@ import org.gradle.api.plugins.ExtensionAware
 import org.gradle.kotlin.dsl.dependencies
 import org.gradle.kotlin.dsl.getByType
 import org.gradle.kotlin.dsl.provideDelegate
+import org.gradle.kotlin.dsl.withType
 import org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 /**
  * Configure base Kotlin with Android options
@@ -44,13 +46,17 @@ internal fun Project.configureKotlinAndroid(
             targetCompatibility = JavaVersion.VERSION_11
             isCoreLibraryDesugaringEnabled = true
         }
+    }
 
+    // Use withType to workaround https://youtrack.jetbrains.com/issue/KT-55947
+    tasks.withType<KotlinCompile>().configureEach {
         kotlinOptions {
+            // Set JVM target to 11
+            jvmTarget = JavaVersion.VERSION_11.toString()
             // Treat all Kotlin warnings as errors (disabled by default)
             // Override by setting warningsAsErrors=true in your ~/.gradle/gradle.properties
             val warningsAsErrors: String? by project
             allWarningsAsErrors = warningsAsErrors.toBoolean()
-
             freeCompilerArgs = freeCompilerArgs + listOf(
                 "-opt-in=kotlin.RequiresOptIn",
                 // Enable experimental coroutines APIs, including Flow
@@ -58,9 +64,6 @@ internal fun Project.configureKotlinAndroid(
                 "-opt-in=kotlinx.coroutines.FlowPreview",
                 "-opt-in=kotlin.Experimental",
             )
-
-            // Set JVM target to 11
-            jvmTarget = JavaVersion.VERSION_11.toString()
         }
     }
 
@@ -70,7 +73,3 @@ internal fun Project.configureKotlinAndroid(
         add("coreLibraryDesugaring", libs.findLibrary("android.desugarJdkLibs").get())
     }
 }
-
-fun CommonExtension<*, *, *, *>.kotlinOptions(block: KotlinJvmOptions.() -> Unit) {
-    (this as ExtensionAware).extensions.configure("kotlinOptions", block)
-}
diff --git a/core/datastore/build.gradle.kts b/core/datastore/build.gradle.kts
index 1787a5b8f..59a3a8e32 100644
--- a/core/datastore/build.gradle.kts
+++ b/core/datastore/build.gradle.kts
@@ -14,11 +14,6 @@
  * limitations under the License.
  */
 
-import com.google.protobuf.gradle.builtins
-import com.google.protobuf.gradle.generateProtoTasks
-import com.google.protobuf.gradle.protobuf
-import com.google.protobuf.gradle.protoc
-
 // TODO: Remove once https://youtrack.jetbrains.com/issue/KTIJ-19369 is fixed
 @Suppress("DSL_SCOPE_VIOLATION")
 plugins {
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 677438412..08af52b65 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,7 +1,7 @@
 [versions]
 accompanist = "0.28.0"
 androidDesugarJdkLibs = "1.2.2"
-androidGradlePlugin = "7.4.1"
+androidGradlePlugin = "8.0.0"
 androidxActivity = "1.7.0"
 androidxAppCompat = "1.5.1"
 androidxBrowser = "1.4.0"
@@ -45,7 +45,7 @@ ksp = "1.8.0-1.0.9"
 lint = "30.3.1"
 okhttp = "4.10.0"
 protobuf = "3.21.12"
-protobufPlugin = "0.8.19"
+protobufPlugin = "0.9.1"
 retrofit = "2.9.0"
 retrofitKotlinxSerializationJson = "0.8.0"
 room = "2.5.0"
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 249e5832f..943f0cbfa 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 070cb702f..0c85a1f75 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1-bin.zip
+networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index a69d9cb6c..65dcd68d6 100755
--- a/gradlew
+++ b/gradlew
@@ -55,7 +55,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,10 +80,10 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
@@ -143,12 +143,16 @@ fi
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045 
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045 
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
diff --git a/gradlew.bat b/gradlew.bat
index 53a6b238d..6689b85be 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -26,6 +26,7 @@ if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
diff --git a/kokoro/build.sh b/kokoro/build.sh
index 5c50a814f..2036d1e07 100755
--- a/kokoro/build.sh
+++ b/kokoro/build.sh
@@ -36,7 +36,7 @@ echo y | ${ANDROID_HOME}/tools/bin/sdkmanager --licenses
 cd $KOKORO_ARTIFACTS_DIR/git/nowinandroid
 
 # The build needs Java 11, set it as the default Java version.
-sudo update-java-alternatives --set java-1.11.0-openjdk-amd64
+sudo update-java-alternatives --set java-1.17.0-openjdk-amd64
 
 # Also clear JAVA_HOME variable so java -version is used instead
 export JAVA_HOME=
diff --git a/lint/build.gradle.kts b/lint/build.gradle.kts
index bbf24126d..08ab9bec4 100644
--- a/lint/build.gradle.kts
+++ b/lint/build.gradle.kts
@@ -13,6 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
 plugins {
     `java-library`
     kotlin("jvm")
@@ -24,6 +27,12 @@ java {
     targetCompatibility = JavaVersion.VERSION_11
 }
 
+tasks.withType<KotlinCompile>().configureEach {
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_11.toString()
+    }
+}
+
 dependencies {
     compileOnly(libs.kotlin.stdlib)
     compileOnly(libs.lint.api)