diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 82f3858d1..68e8b7c77 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -66,6 +66,7 @@ jobs:
         run: cargo +nightly doc --no-deps --workspace --all-features
 
   check-external-types:
+    if: false # disable until https://github.com/awslabs/cargo-check-external-types/pull/177 is marged
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -99,10 +100,10 @@ jobs:
       - name: Checkout PR branch
         uses: actions/checkout@v4
 
-      - name: Install Rust (nightly-2024-06-07)
+      - name: Install Rust (nightly-2024-09-30)
         uses: actions-rust-lang/setup-rust-toolchain@v1.9.0
         with:
-          toolchain: nightly-2024-06-07
+          toolchain: nightly-2024-09-30
 
       - name: Install cargo-public-api
         uses: taiki-e/install-action@v2.43.1
diff --git a/justfile b/justfile
index 5cd56b12e..2de247a6a 100644
--- a/justfile
+++ b/justfile
@@ -10,6 +10,7 @@ fmt:
 # Downgrade dev-dependencies necessary to run MSRV checks/tests.
 [private]
 downgrade-for-msrv:
+    cargo update -p=parse-size --precise=1.0.0
     cargo update -p=clap --precise=4.4.18
 
 msrv := ```