If you're a fan of Amazon's Prime service, be prepared to pay more when your membership renews this year. Amazon sent out a letter to Prime members to let them know that it'll cost $99 from here on out, up from $79.

In an email sent to Amazon Prime subscribers, the company explained the change:

Even as fuel and transportation costs have increased, the price of Prime has remained the same for nine years. Since 2005, the number of items eligible for unlimited free Two-Day Shipping has grown from one million to over 20 million.

Amazon Prime provides free two-day shipping on eligible purchases made from Amazon.com, unlimited streaming of Prime Instant Video — 40,000 movies and TV shows — and the ability to borrow over 500,000 Kindle e-books from the Kindle Owners Lending Library.

If you want Prime for $79, you still have a bit of time to act — the new prices don't go into effect until mid-April. Current members won't have to pay until their membership renews. Amazon noted that its Amazon Student members will pay $49, a stiff $39 price rise. The company's grocery delivery service, Prime Fresh, remains the same at $299.

Some Amazon customers are bound to find the new price not worth it. In fairness, it's not as bad as what Amazon first suggested — earlier this year the company said it was considering raising the annual Prime membership by $40, to $119 per year.

Are you an Amazon Prime subscriber? Is it still worth it to you at $99 a year? Let me know what you think in the comments.