diff --git a/src/main/java/org/gcube/dataaccess/databases/lexer/LexicalAnalyzer.java b/src/main/java/org/gcube/dataaccess/databases/lexer/LexicalAnalyzer.java
index 912be1b..15d01cc 100644
--- a/src/main/java/org/gcube/dataaccess/databases/lexer/LexicalAnalyzer.java
+++ b/src/main/java/org/gcube/dataaccess/databases/lexer/LexicalAnalyzer.java
@@ -23,8 +23,8 @@ public class LexicalAnalyzer {
 		// the following keywords are common for MySQL and PostgreSQL databases.
 
 		BlackList.add("INSERT");
-		BlackList.add("DELETE ");
-		BlackList.add("UPDATE ");
+		BlackList.add("DELETE");
+		BlackList.add("UPDATE");
 		BlackList.add("CREATE");
 		BlackList.add("ALTER");
 		BlackList.add("DROP");