diff --git a/Cargo.toml b/Cargo.toml
index 584a5581..ae8849ba 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ version = "0.1.0"
 [workspace.package]
 # This must be kept in sync with rust-toolchain.toml; please see that file for
 # more information.
-rust-version = "1.74"
+rust-version = "1.75"
 
 [dependencies]
 libtock_adc = { path = "apis/adc" }
diff --git a/nightly/rust-toolchain.toml b/nightly/rust-toolchain.toml
index 60a2dd81..23f78a37 100644
--- a/nightly/rust-toolchain.toml
+++ b/nightly/rust-toolchain.toml
@@ -1,4 +1,4 @@
 # This is the nightly Rust toolchain used by `make test`.
 [toolchain]
-channel = "nightly-2023-08-22"
+channel = "nightly-2024-04-19"
 components = ["miri", "rust-src"]
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 1fea1b4f..c7355f98 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -5,7 +5,7 @@
 # you'd like to use. When you do so, update this to the first Rust version that
 # includes that feature. Whenever this value is updated, the rust-version field
 # in Cargo.toml must be updated as well.
-channel = "1.74"
+channel = "1.75"
 components = ["clippy", "rustfmt"]
 targets = ["thumbv6m-none-eabi",
            "thumbv7em-none-eabi",