diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6667d2a4a0872317114cbae1db0a6f6c48e671ac..a8982b6c6a553c15cd069540d48c80fc4775319f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -71,7 +71,7 @@ documentation:pdf:
   - mdbook build documentation --dest-dir public
   cache:
     paths:
-    - /root/.cargo/bin/mdbook
+    - /root/.cargo/
 
 documentation:static:
   rules: