diff --git a/src/main/java/common/Utils.java b/src/main/java/common/Utils.java
index 2d566a1bb1..01b583930c 100644
--- a/src/main/java/common/Utils.java
+++ b/src/main/java/common/Utils.java
@@ -29,7 +29,7 @@ public static String formatDate(LocalDate date){
     }
 
     public static void validate(int integer) {
-        if (integer < 0){
+        if (integer <= 0){
             throw ParserException.invalidInt(integer);
         }
     }
diff --git a/src/main/java/exceptions/ParserException.java b/src/main/java/exceptions/ParserException.java
index 0c3c1c127d..0d05992340 100644
--- a/src/main/java/exceptions/ParserException.java
+++ b/src/main/java/exceptions/ParserException.java
@@ -43,7 +43,7 @@ public static ParserException invalidInt(int no) {
      * @return A {@code ParserExceptions} with a message indicating that the provided date is invalid.
      */
     public static ParserException invalidDate(String date) {
-        return new ParserException("Invalid Date: " + date + ",Provide Date in format dd-MM-yyyy.");
+        return new ParserException("Invalid Date: " + date + ", Provide Date in format dd-MM-yyyy.");
     }
 
     /**