diff --git a/buildSrc/src/main/java/BaseProjectConfig.kt b/buildSrc/src/main/java/BaseProjectConfig.kt
index 7666424c..808d428d 100644
--- a/buildSrc/src/main/java/BaseProjectConfig.kt
+++ b/buildSrc/src/main/java/BaseProjectConfig.kt
@@ -51,6 +51,7 @@ internal fun Project.configureForAllProjects() {
   }
   tasks.withType<KotlinCompile> {
     kotlinOptions {
+      allWarningsAsErrors = true
       jvmTarget = JavaVersion.VERSION_1_8.toString()
       freeCompilerArgs = freeCompilerArgs + additionalCompilerArgs
       languageVersion = "1.5"
diff --git a/buildSrc/src/main/java/PasswordStorePlugin.kt b/buildSrc/src/main/java/PasswordStorePlugin.kt
index aa2f152f..5db8c893 100644
--- a/buildSrc/src/main/java/PasswordStorePlugin.kt
+++ b/buildSrc/src/main/java/PasswordStorePlugin.kt
@@ -38,6 +38,7 @@ class PasswordStorePlugin : Plugin<Project> {
           project.tasks.withType<JavaCompile> {
             options.compilerArgs.add("-Xlint:unchecked")
             options.isDeprecation = true
+            options.isWarnings = true
           }
         }
         is LibraryPlugin -> {