diff --git a/Changes b/Changes
index 707059d..558710c 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
-0.54 2015-09-25
-   	- [performance] Updated Lucene dependency from 4.10.3 to 5.0.0 (diewald)
+0.54 2015-09-30
+   	- [performance] Updated Lucene dependency from 4.10.3
+	  to 5.0.0 (diewald)
+        - [bugfix] Minor fixes regarding invalid tokens in the
+	  test suite (diewald)
 
 0.53 2015-09-25
         - [feature] Implemented new KrillCollection (diewald)
diff --git a/src/main/java/de/ids_mannheim/korap/collection/BooleanGroupFilter.java b/src/main/java/de/ids_mannheim/korap/collection/BooleanGroupFilter.java
index d6a750e..1e5c878 100644
--- a/src/main/java/de/ids_mannheim/korap/collection/BooleanGroupFilter.java
+++ b/src/main/java/de/ids_mannheim/korap/collection/BooleanGroupFilter.java
@@ -121,6 +121,13 @@
         return buffer.append(')').toString();
     };
 
+    /*
+    @Override
+    public String toString (String str) {
+        return this.toString();
+    };
+    */
+
 
     @Override
     public DocIdSet getDocIdSet (LeafReaderContext context, Bits acceptDocs)
diff --git a/src/main/java/de/ids_mannheim/korap/query/SpanNextQuery.java b/src/main/java/de/ids_mannheim/korap/query/SpanNextQuery.java
index 8d2021e..fb0d382 100644
--- a/src/main/java/de/ids_mannheim/korap/query/SpanNextQuery.java
+++ b/src/main/java/de/ids_mannheim/korap/query/SpanNextQuery.java
@@ -88,6 +88,7 @@
 
 
     @Override
+    // TODO: 5.3 removes getSpans fro SpanQuery ... oh, well ...
     public Spans getSpans (final LeafReaderContext context, Bits acceptDocs,
             Map<Term, TermContext> termContexts) throws IOException {
         return (Spans) new NextSpans(this, context, acceptDocs, termContexts);