diff --git a/api/build.gradle b/api/build.gradle
index db04330..a729d37 100644
--- a/api/build.gradle
+++ b/api/build.gradle
@@ -6,7 +6,7 @@ plugins {
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(21)
+        languageVersion = JavaLanguageVersion.of(17)
         vendor = JvmVendorSpec.AMAZON
     }
 }