diff --git a/Dockerfile b/Dockerfile
index c7db54840..d5f3d5572 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ ENV RUSTUP_HOME=/usr/local/rustup \
     CARGO_HOME=/usr/local/cargo \
     PATH=/usr/local/cargo/bin:$PATH \
     # Manually sync this with rust-toolchain.toml!
-    RUST_VERSION=nightly-2023-08-01 \
+    RUST_VERSION=nightly-2023-08-15 \
     RUST_COMPONENTS="rust-src"
 
 RUN set -eux; \
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 5542a1749..322da7899 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,4 +1,4 @@
 [toolchain]
 # Manually sync this with Dockerfile!
-channel = "nightly-2023-08-01"
+channel = "nightly-2023-08-15"
 components = [ "rust-src" ]