Yes, you can improve your credit score. Just remember there are no quick fixes. The way to an improved credit score is to manage your credit responsibly over time. 

Pay bills on time

 -  Late payments have a major impact lowering your  

    credit score.  

 -  The longer your history of paying on time, the better

    your score.

 -  If you’ve missed payments, catch up and stay current.

 -  If your account goes into collections, pay it off as soon as

    possible. It will stay on your credit history for 7 years after

    payoff.

-  If you are having trouble making payments, contact your

   creditors or a credit counselor. This will help you manage

   your credit and improve your score over time.

Keep the amount you owe under control 

-  Keep your balances low on credit cards. Outstanding debt

   will affect your credit score.

-  Pay off debts. History of paying off your debts will improve

   the credit score. 

-  Don’t close accounts when you transfer balances or close

   unused credit cards. Owing the same amount, but having

   fewer open credit accounts may lower your score.

-  Don’t open new accounts that you don’t need. This may

   lower your credit score.

Develop a healthy credit history

-  If you are a new credit user, don’t open too many accounts

   too quickly. This could make it look like you plan to over

   extend yourself and lower your score.

-  Credit history includes an average account age. Keep that

   in mind as you open and close accounts that may affect your

   score. 

-  Potential creditor inquiries also affect your score. It is

   better to have many inquiries in a short period to show

   you are shopping for loan rates. Many inquiries over a

   longer period may appear that you are looking to open

   many accounts and get into more debt than you can handle.

-  Open a new account and pay it off. This will show

   responsible account management and your interest and

   ability to pay off your debts. This is also a good way to

   re-establish credit if you have had problems in the past.

-  Requests for your own credit report from one of the three 

   credit agencies (Equifax, Experian, TransUnion), will not

   affect your credit score. 

-  A good payment history on both credit cards and installment

   loans will provide a better score than just having a history

   of good payment on one type of loan or the other. Someone

   with no credit cards will be looked at as a higher risk than

   someone who has managed credit cards responsibly in the

   past. 

-  Closed accounts will remain on your credit report. There is

   no way to erase bad credit history except to change your

   behavior going forward. Act responsibly; make payments on

   time and payoff the loans to improve your score. 

So, yes you can improve your score. Stay on top of your credit and debt situation. Be aware of the things that can affect your score and make smart choices. Pay on time and develop history of paying off your debts.   Responsible debt management will have greatest impact on improving your credit score.