diff --git a/build.gradle b/build.gradle
index 4120bf1563d..b6ecbc8e959 100644
--- a/build.gradle
+++ b/build.gradle
@@ -389,7 +389,7 @@ task generateJournalAbbreviationList(type: JournalAbbreviationConverter) {
 apollo {
   schemaFile = file("src/main/java/org/jabref/jabrefonline/graphql/schema.json")
   graphqlSourceDirectorySet.srcDirs += "src/main/java/org/jabref/jabrefonline/graphql/"
-  graphqlSourceDirectorySet.exclude = ["schema.json"]
+  graphqlSourceDirectorySet.excludes = ["schema.json"]
   customTypeMapping = [
     "DateTime" : "java.time.LocalDateTime"
   ]