diff --git a/codecs/build-rust-nightly.sh b/codecs/build-rust-nightly.sh
index ab5ae1ea..d407b432 100644
--- a/codecs/build-rust-nightly.sh
+++ b/codecs/build-rust-nightly.sh
@@ -1,4 +1,4 @@
 set -e
 
-docker build -t squoosh-rust-nightly --build-arg RUST_IMG=rustlang/rust:nightly - < ../rust.Dockerfile
+docker build -t squoosh-rust-nightly --build-arg RUST_IMG=rustlang/rust@sha256:a7e9ab157d7720536fd8e1db918dde49fb642f2b4db90f97cec2b8b6d6e4250b - < ../rust.Dockerfile
 docker run --rm -v $PWD:/src squoosh-rust-nightly "$@"
diff --git a/codecs/oxipng/pkg-parallel/squoosh_oxipng_bg.wasm b/codecs/oxipng/pkg-parallel/squoosh_oxipng_bg.wasm
index 134f5c04..a412e3ff 100644
Binary files a/codecs/oxipng/pkg-parallel/squoosh_oxipng_bg.wasm and b/codecs/oxipng/pkg-parallel/squoosh_oxipng_bg.wasm differ
diff --git a/codecs/oxipng/pkg/squoosh_oxipng_bg.wasm b/codecs/oxipng/pkg/squoosh_oxipng_bg.wasm
index 8dc19bc2..cadc2f8f 100644
Binary files a/codecs/oxipng/pkg/squoosh_oxipng_bg.wasm and b/codecs/oxipng/pkg/squoosh_oxipng_bg.wasm differ
diff --git a/codecs/rust.Dockerfile b/codecs/rust.Dockerfile
index 902c8b0e..642958ab 100644
--- a/codecs/rust.Dockerfile
+++ b/codecs/rust.Dockerfile
@@ -7,7 +7,7 @@ RUN wget -qO- https://github.com/rustwasm/wasm-pack/releases/download/v0.9.1/was
 FROM $RUST_IMG AS rust
 ARG RUST_IMG
 RUN rustup target add wasm32-unknown-unknown
-RUN if [ "$RUST_IMG" = "rustlang/rust:nightly" ] ; then rustup component add rust-src ; fi
+RUN rustup component add rust-src
 COPY --from=wasm-tools /emsdk/upstream/bin/wasm-opt /emsdk/upstream/bin/clang /usr/local/bin/
 COPY --from=wasm-tools /emsdk/upstream/lib/ /usr/local/lib/
 COPY --from=wasm-tools /emsdk/upstream/emscripten/system/include/libc/ /wasm32/include/