diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index e7bfb3d5..af2ded71 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -63,4 +63,4 @@ jobs:
           tool: cargo-check-external-types@0.1.10
 
       - name: check external types
-        run: just check-external-types-all
+        run: just check-external-types-all +nightly-2023-10-10
diff --git a/justfile b/justfile
index 3895e03d..72331f9e 100644
--- a/justfile
+++ b/justfile
@@ -11,27 +11,27 @@ doc-watch:
     cargo watch -- RUSTDOCFLAGS="--cfg=docsrs" cargo +nightly doc --no-deps --workspace --features=rustls,openssl
 
 # Check for unintentional external type exposure on all crates in workspace.
-check-external-types-all:
+check-external-types-all toolchain="+nightly":
     #!/usr/bin/env bash
     set -euo pipefail
     exit=0
     for f in $(find . -mindepth 2 -maxdepth 2 -name Cargo.toml | grep -vE "\-codegen/|\-derive/|\-macros/"); do
-        if ! just check-external-types-manifest "$f"; then exit=1; fi
+        if ! just check-external-types-manifest "$f" {{toolchain}}; then exit=1; fi
         echo
         echo
     done
     exit $exit
 
 # Check for unintentional external type exposure on all crates in workspace.
-check-external-types-all-table:
+check-external-types-all-table toolchain="+nightly":
     #!/usr/bin/env bash
     set -euo pipefail
     for f in $(find . -mindepth 2 -maxdepth 2 -name Cargo.toml | grep -vE "\-codegen/|\-derive/|\-macros/"); do
         echo
         echo "Checking for $f"
-        just check-external-types-manifest "$f" --output-format=markdown-table
+        just check-external-types-manifest "$f" {{toolchain}} --output-format=markdown-table
     done
 
 # Check for unintentional external type exposure on a crate.
-check-external-types-manifest manifest_path *extra_args:
-    cargo +nightly check-external-types --manifest-path "{{manifest_path}}" {{extra_args}}
+check-external-types-manifest manifest_path toolchain="+nightly" *extra_args="":
+    cargo {{toolchain}} check-external-types --manifest-path "{{manifest_path}}" {{extra_args}}