diff --git a/ci/install.sh b/ci/install.sh
index 80f8de4e..947d751b 100755
--- a/ci/install.sh
+++ b/ci/install.sh
@@ -20,5 +20,5 @@ function cargo_install() {
   fi
 }
 
-cargo_install mdbook 0.2
-cargo_install mdbook-linkcheck 0.2
+cargo_install mdbook 0.2.2
+cargo_install mdbook-linkcheck 0.2.3