diff --git a/src/main/java/de/ids_mannheim/korap/query/serialize/CQLTree.java b/src/main/java/de/ids_mannheim/korap/query/serialize/CQLTree.java
index b58d3b2..92f74e5 100644
--- a/src/main/java/de/ids_mannheim/korap/query/serialize/CQLTree.java
+++ b/src/main/java/de/ids_mannheim/korap/query/serialize/CQLTree.java
@@ -116,7 +116,7 @@
         checkBooleanModifier(node);
         sb.append("{\"@type\":\"korap:group\", \"operation\":");
         sb.append(OPERATION_SEQUENCE);
-        sb.append(", distances:[{\"@type\":\"korap:distance\", \"key\":\"t\"," +
+        sb.append(", \"distances\":[{\"@type\":\"korap:distance\", \"key\":\"t\"," +
                 " \"min\":0, \"max\":0}]");
         sb.append(", \"operands\":[");
         parseCQLNode(node.getLeftOperand());
diff --git a/src/test/java/CQLTest.java b/src/test/java/CQLTest.java
index d9dba01..df48e52 100644
--- a/src/test/java/CQLTest.java
+++ b/src/test/java/CQLTest.java
@@ -17,34 +17,34 @@
 	public void testBooleanQuery() throws CQLParseException, IOException, QueryException{		
 		query="((Sonne) or (Mond)) and (scheint)";		
 		String jsonLd = 
-			"{@type=korap:group, operation=operation:sequence, distances=[" +
-				"{@type=korap:distance, key=t, min=0, max=0}" +
-				"], operands=[" +
-					"{@type=korap:group, operation=operation:or, operands=[" +
-						"{@type=korap:token, wrap={@type=korap:term, key=Sonne, layer=orth, match=match:eq}}," +
-						"{@type=korap:token, wrap={@type=korap:term, key=Mond, layer=orth, match=match:eq}}" +
+			"{@type:korap:group, operation:operation:sequence, distances:[" +
+				"{@type:korap:distance, key:t, min:0, max:0}" +
+				"], operands:[" +
+					"{@type:korap:group, operation:operation:or, operands:[" +
+						"{@type:korap:token, wrap:{@type:korap:term, key:Sonne, layer:orth, match:match:eq}}," +
+						"{@type:korap:token, wrap:{@type:korap:term, key:Mond, layer:orth, match:match:eq}}" +
 					"]}," +
-					"{@type=korap:token, wrap={@type=korap:term, key=scheint, layer=orth, match=match:eq}}" +
+					"{@type:korap:token, wrap:{@type:korap:term, key:scheint, layer:orth, match:match:eq}}" +
 			"]}";
 		CQLTree cqlTree = new CQLTree(query, version);		
 		String serializedQuery = cqlTree.getRequestMap().get("query").toString();
-		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace(" ", ""));
+		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace("\"", ""));
 		
 		
 		query="(scheint) and ((Sonne) or (Mond))";
 		jsonLd = 
-				"{@type=korap:group, operation=operation:sequence, distances=[" +
-						"{@type=korap:distance, key=t, min=0, max=0}" +
-					"], operands=[" +
-						"{@type=korap:token, wrap={@type=korap:term, key=scheint, layer=orth, match=match:eq}}," +
-						"{@type=korap:group, operation=operation:or, operands=[" +
-							"{@type=korap:token, wrap={@type=korap:term, key=Sonne, layer=orth, match=match:eq}}," +
-							"{@type=korap:token, wrap={@type=korap:term, key=Mond, layer=orth, match=match:eq}}" +
+				"{@type:korap:group, operation:operation:sequence, distances:[" +
+						"{@type:korap:distance, key:t, min:0, max:0}" +
+					"], operands:[" +
+						"{@type:korap:token, wrap:{@type:korap:term, key:scheint, layer:orth, match:match:eq}}," +
+						"{@type:korap:group, operation:operation:or, operands:[" +
+							"{@type:korap:token, wrap:{@type:korap:term, key:Sonne, layer:orth, match:match:eq}}," +
+							"{@type:korap:token, wrap:{@type:korap:term, key:Mond, layer:orth, match:match:eq}}" +
 					"]}" +
 				"]}";
 		cqlTree = new CQLTree(query, version);		
 		serializedQuery = cqlTree.getRequestMap().get("query").toString();
-		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace(" ", ""));
+		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace("\"", ""));
 		
 	}
 	
@@ -52,79 +52,79 @@
 	public void testOrQuery() throws CQLParseException, IOException, QueryException{
 		query = "(Sonne) or (Mond)";		
 		String jsonLd = 
-			"{@type=korap:group, operation=operation:or, operands=[" +
-				"{@type=korap:token, wrap={@type=korap:term, key=Sonne, layer=orth, match=match:eq}}," +
-				"{@type=korap:token, wrap={@type=korap:term, key=Mond, layer=orth, match=match:eq}}" +
+			"{@type:korap:group, operation:operation:or, operands:[" +
+				"{@type:korap:token, wrap:{@type:korap:term, key:Sonne, layer:orth, match:match:eq}}," +
+				"{@type:korap:token, wrap:{@type:korap:term, key:Mond, layer:orth, match:match:eq}}" +
 			"]}";		
 		
 		CQLTree cqlTree = new CQLTree(query, version);		
 		String serializedQuery = cqlTree.getRequestMap().get("query").toString();
-		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace(" ", ""));
+		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace("\"", ""));
 		
 		query="(\"Sonne scheint\") or (Mond)";		
 		jsonLd = 
-			"{@type=korap:group, operation=operation:or, operands=[" +
-				"{@type=korap:group, operation=operation:sequence, operands=[" +
-					"{@type=korap:token, wrap={@type=korap:term, key=Sonne, layer=orth, match=match:eq}}," +
-					"{@type=korap:token, wrap={@type=korap:term, key=scheint, layer=orth, match=match:eq}}" +
+			"{@type:korap:group, operation:operation:or, operands:[" +
+				"{@type:korap:group, operation:operation:sequence, operands:[" +
+					"{@type:korap:token, wrap:{@type:korap:term, key:Sonne, layer:orth, match:match:eq}}," +
+					"{@type:korap:token, wrap:{@type:korap:term, key:scheint, layer:orth, match:match:eq}}" +
 				"]}," +
-				"{@type=korap:token, wrap={@type=korap:term, key=Mond, layer=orth, match=match:eq}}" +
+				"{@type:korap:token, wrap:{@type:korap:term, key:Mond, layer:orth, match:match:eq}}" +
 			"]}";
 		
 		cqlTree = new CQLTree(query, version);		
 		serializedQuery = cqlTree.getRequestMap().get("query").toString();
-		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace(" ", ""));
+		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace("\"", ""));
 				
 		query="(\"Sonne scheint\") or (\"Mond scheint\")";		
 		jsonLd = 
-			"{@type=korap:group, operation=operation:or, operands=[" +
-					"{@type=korap:group, operation=operation:sequence, operands=[" +
-						"{@type=korap:token, wrap={@type=korap:term, key=Sonne, layer=orth, match=match:eq}}," +
-						"{@type=korap:token, wrap={@type=korap:term, key=scheint, layer=orth, match=match:eq}}" +
+			"{@type:korap:group, operation:operation:or, operands:[" +
+					"{@type:korap:group, operation:operation:sequence, operands:[" +
+						"{@type:korap:token, wrap:{@type:korap:term, key:Sonne, layer:orth, match:match:eq}}," +
+						"{@type:korap:token, wrap:{@type:korap:term, key:scheint, layer:orth, match:match:eq}}" +
 					"]}," +
-					"{@type=korap:group, operation=operation:sequence, operands=[" +
-						"{@type=korap:token, wrap={@type=korap:term, key=Mond, layer=orth, match=match:eq}}," +
-						"{@type=korap:token, wrap={@type=korap:term, key=scheint, layer=orth, match=match:eq}}" +
+					"{@type:korap:group, operation:operation:sequence, operands:[" +
+						"{@type:korap:token, wrap:{@type:korap:term, key:Mond, layer:orth, match:match:eq}}," +
+						"{@type:korap:token, wrap:{@type:korap:term, key:scheint, layer:orth, match:match:eq}}" +
 					"]}" +
 				"]}";
 		cqlTree = new CQLTree(query, version);		
 		serializedQuery = cqlTree.getRequestMap().get("query").toString();
-		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace(" ", ""));
+		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace("\"", ""));
 	}
 	
 	@Test
 	public void testTermQuery() throws CQLParseException, IOException, QueryException{
 		query = "Sonne";		
-		String jsonLd = "{@type=korap:token, wrap={@type=korap:term, key=Sonne, layer=orth, match=match:eq}}";		
+		String jsonLd = "{@type:korap:token, wrap:{@type:korap:term, key:Sonne, layer:orth, match:match:eq}}";		
 		CQLTree cqlTree = new CQLTree(query, version);		
 		String serializedQuery = cqlTree.getRequestMap().get("query").toString();		
-		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace(" ", ""));
+		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace("\"", ""));
 	}
 	
 	@Test
 	public void testPhraseQuery() throws CQLParseException, IOException, QueryException{
 		query="\"der Mann\"";				
 		String jsonLd = 
-				"{@type=korap:group, operation=operation:sequence, operands=[" +
-					"{@type=korap:token, wrap={@type=korap:term, key=der, layer=orth, match=match:eq}}," +
-					"{@type=korap:token, wrap={@type=korap:term, key=Mann, layer=orth, match=match:eq}}" +
-				"]}";
+			"{@type:korap:group, operation:operation:sequence, operands:[" +
+				"{@type:korap:token, wrap:{@type:korap:term, key:der, layer:orth, match:match:eq}}," +
+				"{@type:korap:token, wrap:{@type:korap:term, key:Mann, layer:orth, match:match:eq}}" +
+			"]}";
 		
 		CQLTree cqlTree = new CQLTree(query, version);		
 		String serializedQuery = cqlTree.getRequestMap().get("query").toString();
-		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace(" ", ""));
+		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace("\"", ""));
 		
 		
 		query="der Mann schläft";
 		jsonLd = 
-				"{@type=korap:group, operation=operation:sequence, operands=[" +
-					"{@type=korap:token, wrap={@type=korap:term, key=der, layer=orth, match=match:eq}}," +
-					"{@type=korap:token, wrap={@type=korap:term, key=Mann, layer=orth, match=match:eq}}," +
-					"{@type=korap:token, wrap={@type=korap:term, key=schläft, layer=orth, match=match:eq}}" +
-				"]}";
+			"{@type:korap:group, operation:operation:sequence, operands:[" +
+				"{@type:korap:token, wrap:{@type:korap:term, key:der, layer:orth, match:match:eq}}," +
+				"{@type:korap:token, wrap:{@type:korap:term, key:Mann, layer:orth, match:match:eq}}," +
+				"{@type:korap:token, wrap:{@type:korap:term, key:schläft, layer:orth, match:match:eq}}" +
+			"]}";
 		
 		cqlTree = new CQLTree(query, version);		
 		serializedQuery = cqlTree.getRequestMap().get("query").toString();
-		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace(" ", ""));
+		assertEquals(jsonLd.replace(" ", ""), serializedQuery.replace("\"", ""));
 	}	
 }