diff --git a/Cargo.toml b/Cargo.toml
index ed9c2e57bb..754422e92c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,7 @@ rustdoc-args = ["--cfg", "doc_cfg", "--generate-link-to-definition"]
 [package.metadata.ci]
 # The versions of the stable and nightly compiler toolchains to use in CI.
 pinned-stable = "1.74.1"
-pinned-nightly = "nightly-2023-12-16"
+pinned-nightly = "nightly-2023-12-17"
 
 [package.metadata.playground]
 features = ["__internal_use_only_features_that_work_on_stable"]