Scottish author Kate Clanchy said she plans to update future editions of her memoir Some Kids I Taught and What They Taught Me to remove racial stereotypes, she announced on Twitter.

The move comes after her book, an account of her 30-year teaching career, was criticized on social media for passages that described some of her students as having “chocolate-colored skin” and “almond-shaped eyes,” the Guardian reports.

Clanchy initially pushed back against the criticism, but she backed down with a statement saying she would “take time to reflect upon views of the many readers of colour who have responded to my writing to put these learnings into practice in my work as both teacher and writer.”

On Monday, Clanchy tweeted, “I’ve been given the chance to do some re-writing on Some Kids. I’m grateful: I know I got many things wrong, and welcome the chance to write better, more lovingly.…I am not a good person. I do try to say that in my book. Not a pure person, not a patient person, no one’s saviour. You are right to blame me, and I blame myself.”

Author Philip Pullman also apologized for a tweet in which he defended Clanchy, writing, “The criticism that some people have made of aspects of Kate Clanchy’s book is reasonable and balanced.…I apologise for causing harm (not IF what I say has caused harm: I know it has).”

Michael Schaub is a Texas-based journalist and regular contributor to NPR.