diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index b08d662561538..e0a2744108989 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -9,7 +9,7 @@ on:
 env:
   SCCACHE_GHA_ENABLED: "true"
   RUSTC_WRAPPER: "sccache"
-  RUSTDOCFLAGS: "--markdown-css rust.css --markdown-no-toc --index-page /home/runner/work/risingwave/risingwave/docs/rustdoc/index.md -Zunstable-options"
+  RUSTDOCFLAGS: "--markdown-css rust.css --markdown-no-toc --index-page /home/runner/work/risingwave/risingwave/docs/rustdoc/index.md -Zunstable-options -Zhigher-ranked-assumptions"
 
 jobs:
   build:
diff --git a/Makefile.toml b/Makefile.toml
index 19f877e23838b..2cf756d9ffe86 100644
--- a/Makefile.toml
+++ b/Makefile.toml
@@ -487,7 +487,7 @@ private = true
 category = "RiseDev - Build"
 description = "Build Rust docs"
 condition = { env_set = ["ENABLE_BUILD_RUST"] }
-env = { RUSTDOCFLAGS = "--markdown-css ../../docs/rustdoc/rust.css --markdown-no-toc --index-page docs/rustdoc/index.md -Zunstable-options" }
+env = { RUSTDOCFLAGS = "--markdown-css ../../docs/rustdoc/rust.css --markdown-no-toc --index-page docs/rustdoc/index.md -Zunstable-options -Zhigher-ranked-assumptions" }
 script = '''
 #!/usr/bin/env bash