diff --git a/api/build.gradle.kts b/api/build.gradle.kts
index 92d2a3dcda80..3a623d62359c 100644
--- a/api/build.gradle.kts
+++ b/api/build.gradle.kts
@@ -10,6 +10,10 @@ plugins {
 group = "com.ichi2.anki"
 version = "2.0.0"
 
+kotlin {
+    explicitApi()
+}
+
 android {
     namespace = "com.ichi2.anki.api"
     compileSdk = 34