diff --git a/.github/workflows/lint_and_build.yml b/.github/workflows/lint_and_build.yml
index e8a53e8..3975de7 100644
--- a/.github/workflows/lint_and_build.yml
+++ b/.github/workflows/lint_and_build.yml
@@ -35,9 +35,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@nightly
+        uses: dtolnay/rust-toolchain@master
         with:
           components: rustfmt,clippy
+          toolchain: nightly-2024-01-31
       - name: fmt
         run: cargo fmt --check
       - name: clippy
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3f6b6a9..c1b65bf 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -66,16 +66,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Install rust
-        uses: dtolnay/rust-toolchain@nightly
+        uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: nightly-2023-08-01
-          targets: x86_64-unknown-linux-musl
-      - name: Setup rust
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: nightly
-          override: true
-          target: ${{ matrix.target }}
+          toolchain: nightly-2024-01-31
+          targets: ${{ matrix.target }}
       - name: Set up cargo cache
         uses: actions/cache@v4
         continue-on-error: false
diff --git a/Cargo.toml b/Cargo.toml
index 0b715bf..f78f743 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rickview"
-version = "0.2.11"
+version = "0.2.12"
 edition = "2021"
 license = "MIT"
 keywords = ["rdf", "semantic-web", "linked-data"]
diff --git a/Dockerfile b/Dockerfile
index 64f363a..cacbe24 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1
-FROM clux/muslrust:1.73.0-nightly-2023-08-01 AS chef
+FROM clux/muslrust:1.77.0-nightly-2024-01-31 AS chef
 USER root
 RUN cargo install cargo-chef
 WORKDIR /app
diff --git a/README.md b/README.md
index fe50744..f401909 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,10 @@ This requires you to install [Rust including Cargo](https://www.rust-lang.org/to
 I recommend installing Rust via `rustup`, especially on Ubuntu, because `apt install cargo` may install an old version and not work correctly with RickView.
 On Arch Linux however, both `pacman -S rustup` and `pacman -S rust` worked in my testing as the Rust package was much more current and does not require a separate step of choosing between stable and unstable rust.
 
+### Toolchain
+The "hdt" feature, which is enabled by default, requires the nightly toolchain.
+Due to an [issue with a dependency of that feature](https://github.com/rust-lang/packed_simd/issues/359), nightly rust 1.77.0 (2023-01-31) is currently highest supported version.
+
 ## Configure
 Default configuration is stored in `data/default.toml`, which you can override with a custom `data/config.toml` or environment variables.
 Configuration keys are in lower\_snake\_case, while environment variables are prefixed with RICKVIEW\_ and are in SCREAMING\_SNAKE\_CASE.
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 5d56faf..4a4b32f 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,2 +1,6 @@
 [toolchain]
-channel = "nightly"
+# channel = "nightly"
+# nightly 1.78 currently not supported by packed_simd dependency due to the removal of the stdsimd feature
+# see https://github.com/rust-lang/packed_simd/issues/359
+# this is only necessary for the default hdt feature, which you can disable using --no-default-features
+channel = "nightly-2024-01-31"