diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b59e90a262c09dfb1e7c44b05d0d2eac4177b169..e6eb3439ae750e6dafcb19732140b1da10cb8f46 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,9 +6,9 @@ pages:
   - apt update
   - apt install -y wget
   - wget https://github.com/badboy/mdbook-toc/releases/download/0.11.0/mdbook-toc-0.11.0-x86_64-unknown-linux-gnu.tar.gz
-  - wget https://github.com/rust-lang/mdBook/releases/download/v0.4.25/mdbook-v0.4.25-x86_64-unknown-linux-gnu.tar.gz
+  - wget https://github.com/rust-lang/mdBook/releases/download/v0.4.27/mdbook-v0.4.27-x86_64-unknown-linux-gnu.tar.gz
   - tar xvzf mdbook-toc-0.11.0-x86_64-unknown-linux-gnu.tar.gz
-  - tar xvzf mdbook-v0.4.25-x86_64-unknown-linux-gnu.tar.gz
+  - tar xvzf mdbook-v0.4.27-x86_64-unknown-linux-gnu.tar.gz
   - ./mdbook build
   artifacts:
     paths: