diff --git a/.github/workflows/publish-dev-version.yml b/.github/workflows/publish-dev-version.yml
index bf15b3a..02fb216 100644
--- a/.github/workflows/publish-dev-version.yml
+++ b/.github/workflows/publish-dev-version.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Set up Java
         uses: actions/setup-java@v3
         with:
-          java-version: '19'
+          java-version: '17'
           distribution: 'corretto'
 
       - name: Cache Gradle dependencies
diff --git a/.github/workflows/publish-release-version.yml b/.github/workflows/publish-release-version.yml
index 9023c14..993c931 100644
--- a/.github/workflows/publish-release-version.yml
+++ b/.github/workflows/publish-release-version.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Set up Java
         uses: actions/setup-java@v3
         with:
-          java-version: '19'
+          java-version: '17'
           distribution: 'corretto'
       
       - name: Cache Gradle dependencies
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index a4623b5..a6ea7ce 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -15,6 +15,6 @@ jobs:
       - uses: actions/setup-java@v3
         with:
           distribution: 'corretto'
-          java-version: '19'
+          java-version: '17'
           cache: 'gradle'
       - run: ./gradlew test --no-daemon
diff --git a/grpc-engine/android/build.gradle.kts b/grpc-engine/android/build.gradle.kts
index 11fa3d1..27b1883 100644
--- a/grpc-engine/android/build.gradle.kts
+++ b/grpc-engine/android/build.gradle.kts
@@ -12,8 +12,8 @@ android {
     }
 
     compileOptions {
-        targetCompatibility = JavaVersion.VERSION_19
-        sourceCompatibility = JavaVersion.VERSION_19
+        targetCompatibility = JavaVersion.VERSION_17
+        sourceCompatibility = JavaVersion.VERSION_17
     }
 
     namespace = "io.timemates.android.grpc"
@@ -26,7 +26,7 @@ dependencies {
 }
 
 kotlin {
-    jvmToolchain(19)
+    jvmToolchain(17)
 }
 
 deployLibrary {
diff --git a/grpc-engine/build.gradle.kts b/grpc-engine/build.gradle.kts
index 02e99cf..cae6d30 100644
--- a/grpc-engine/build.gradle.kts
+++ b/grpc-engine/build.gradle.kts
@@ -23,6 +23,7 @@ dependencies {
 
 kotlin {
     explicitApi()
+    jvmToolchain(17)
 }
 
 protobuf {
diff --git a/sdk/build.gradle.kts b/sdk/build.gradle.kts
index 047d8cf..bdad811 100644
--- a/sdk/build.gradle.kts
+++ b/sdk/build.gradle.kts
@@ -5,6 +5,7 @@ plugins {
 
 kotlin {
     jvm()
+    jvmToolchain(17)
 
     explicitApi()
 }