diff --git a/Cargo.toml b/Cargo.toml
index 81ad2cc..d4507d8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Armin Becher <armin.becher@gmai.com>"]
 edition = "2018"
 description = "Dynamic generic 2D data structure."
 keywords = [ "2D", "array", "matrix", "data-structure", "2D-vector"]
-categories = [ "science", "data-structure",]
+categories = [ "science", "data-structures",]
 readme = "README.md"
 license = "MIT"
 repository = "https://github.com/becheran/grid"