It should not be a surprise that being a monopoly, Comcast can raise prices at will. Most rate increases for 2019 affect their Cable TV offerings.
One Internet plan price has been raised. The Blast! package (up to 250 mbps) is now $94.95/month, up $2/month from $92.95/month. Their rate sheet is here.
Price increases affect many bundles and average 3.3%. There are also fee increases. More here.