diff --git a/Cargo.toml b/Cargo.toml
index d6e1aebc..a65fff78 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "fsrs"
 version = "0.4.0"
 authors = ["Open Spaced Repetition"]
-categories = ["Algorithms", "Science"]
+categories = ["algorithms", "science"]
 edition = "2021"
 homepage = "https://github.com/open-spaced-repetition"
 keywords = ["spaced-repetition", "algorithm", "fsrs", "machine-learning"]