diff --git a/documentation/dev-portal/book.toml b/documentation/dev-portal/book.toml
index 5c5f028794..fde3d0942c 100644
--- a/documentation/dev-portal/book.toml
+++ b/documentation/dev-portal/book.toml
@@ -48,6 +48,7 @@ assets_version = "2.0.0" # do not edit: managed by `mdbook-admonish install`
 # https://gitlab.com/tglman/mdbook-variables/
 [preprocessor.variables.variables]
 # code prerequisites versions
+minimum_rust_version = "1.66"
 platform_release_version = "v1.1.16"
 upcoming_platform_release_version = "v1.1.17" # to use when adding 'edit on github' plugin
 mix_node_release_version = "v1.1.17"