diff --git a/build.gradle b/build.gradle
index c62c040..bc17989 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ plugins {
 }
 
 group 'com.docutools'
-version = '1.6.3'
+version = '1.6.4-beta.1'
 
 java {
     toolchain {
diff --git a/src/main/java/com/docutools/jocument/impl/IterablePlaceholderData.java b/src/main/java/com/docutools/jocument/impl/IterablePlaceholderData.java
index 7189090..5399144 100644
--- a/src/main/java/com/docutools/jocument/impl/IterablePlaceholderData.java
+++ b/src/main/java/com/docutools/jocument/impl/IterablePlaceholderData.java
@@ -5,6 +5,7 @@
 import com.docutools.jocument.PlaceholderType;
 import java.util.Arrays;
 import java.util.List;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
 
@@ -45,4 +46,10 @@ public long count() {
     return count;
   }
 
+  @Override
+  public String toString() {
+    return StreamSupport.stream(iterable.spliterator(), false)
+        .map(Object::toString)
+        .collect(Collectors.joining(", "));
+  }
 }