diff --git a/orx-expression-evaluator/build.gradle.kts b/orx-expression-evaluator/build.gradle.kts
index 77e0bc3a..1a03c22a 100644
--- a/orx-expression-evaluator/build.gradle.kts
+++ b/orx-expression-evaluator/build.gradle.kts
@@ -58,3 +58,7 @@ kotlin {
 tasks.withType<KotlinCompile<*>> {
     dependsOn(generateKotlinGrammarSource)
 }
+
+tasks.withType<org.gradle.jvm.tasks.Jar> {
+    dependsOn(generateKotlinGrammarSource)
+}
\ No newline at end of file