diff --git a/Cargo.toml b/Cargo.toml
index 6533d84..3b3624b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,6 +11,7 @@ edition = "2018"
 autotests = false
 categories = ["command-line-utilities", "development-tools"]
 keywords = ["command-line", "task", "runner", "development", "utility"]
+exclude = ["/book", "/icon.png", "/screenshot.png", "/www"]
 
 [workspace]
 members = [".", "bin/ref-type", "bin/generate-book"]