diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index 4c84691..5e950ac 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -19,6 +19,7 @@ jobs:
           toolchain: nightly
           profile: minimal
           override: true
+          components: rust-src
       - name: Cache
         uses: Swatinem/rust-cache@v2
       - name: Install mdbook I
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 62550f4..8acd802 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
           toolchain: nightly
           profile: minimal
           override: true
-          components: rustfmt, clippy
+          components: rustfmt, clippy, rust-src
       - name: Cache
         uses: Swatinem/rust-cache@v2
       - name: Check function count badge