diff --git a/core-jdk8/src/main/java/org/bsc/langgraph4j/InvokeConfig.java b/core-jdk8/src/main/java/org/bsc/langgraph4j/InvokeConfig.java
index 3fad8d9..ea24019 100644
--- a/core-jdk8/src/main/java/org/bsc/langgraph4j/InvokeConfig.java
+++ b/core-jdk8/src/main/java/org/bsc/langgraph4j/InvokeConfig.java
@@ -12,7 +12,7 @@ public Optional<CheckpointConfig> getCheckpointConfig() {
         return Optional.ofNullable(checkpointConfig);
     }
 
-    static Builder builder() {
+    public static Builder builder() {
         return new Builder();
     }