diff --git a/bucket4j-core/src/main/java/io/github/bucket4j/VerboseResult.java b/bucket4j-core/src/main/java/io/github/bucket4j/VerboseResult.java
index 6dc29ab0..c834370b 100644
--- a/bucket4j-core/src/main/java/io/github/bucket4j/VerboseResult.java
+++ b/bucket4j-core/src/main/java/io/github/bucket4j/VerboseResult.java
@@ -103,7 +103,7 @@ public long[] getAvailableTokensPerEachBandwidth() {
     /**
      * Describer of internal bucket state
      */
-    interface Diagnostics {
+    public interface Diagnostics {
 
         /**
          * Returns time in nanoseconds that need to wait until bucket will be fully refilled to its maximum