diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
index 8b7da2267cde..c8d371a3d372 100644
--- a/src/tools/tidy/src/deps.rs
+++ b/src/tools/tidy/src/deps.rs
@@ -32,6 +32,7 @@
     "openssl", // BSD+advertising clause, cargo, mdbook
     "pest", // MPL2, mdbook via handlebars
     "thread-id", // Apache-2.0, mdbook
+    "strings", // not in published manifest
 ];
 
 pub fn check(path: &Path, bad: &mut bool) {