diff --git a/docker/natter/Dockerfile b/docker/natter/Dockerfile
index 1d9a5d7..d9a9fb8 100644
--- a/docker/natter/Dockerfile
+++ b/docker/natter/Dockerfile
@@ -1,4 +1,6 @@
-FROM rustlang/rust:nightly-alpine3.19 AS builder
+ARG ALPINE_VERSION="3.20"
+
+FROM rustlang/rust:nightly-alpine$ALPINE_VERSION AS builder
 
 RUN apk add --no-cache musl-dev
 
@@ -6,8 +8,8 @@ RUN mkdir /root/natter
 WORKDIR /root/natter
 COPY . .
 # TODO: Add static build, which currently errors due to proc_macro. RUSTFLAGS="-C target-feature=+crt-static"
-RUN CARGO_TARGET_DIR=/target cargo build --profile release-lto
+RUN --mount=type=tmpfs,target=/tmp --mount=type=cache,target=/usr/local/cargo/registry,sharing=locked CARGO_TARGET_DIR=/target cargo build --profile release-lto
 
-FROM alpine:3.19 AS runner
+FROM alpine:$ALPINE_VERSION AS runner
 
 COPY --from=builder /target/release-lto/natter /usr/bin/
diff --git a/docker/natter_development/Dockerfile b/docker/natter_development/Dockerfile
index 8a07667..66f9bc2 100644
--- a/docker/natter_development/Dockerfile
+++ b/docker/natter_development/Dockerfile
@@ -1,11 +1,13 @@
-FROM rustlang/rust:nightly-alpine3.19 AS builder
+ARG ALPINE_VERSION="3.20"
+
+FROM rustlang/rust:nightly-alpine$ALPINE_VERSION AS builder
 
 RUN apk add --no-cache musl-dev
-RUN cargo install --locked --no-default-features --features ci-autoclean cargo-cache
+RUN --mount=type=tmpfs,target=/tmp --mount=type=cache,target=/usr/local/cargo/registry,sharing=locked cargo install --locked --no-default-features --features ci-autoclean cargo-cache
 RUN rustup component add rustfmt
 RUN rustup component add clippy
 
 FROM builder AS javascript
 
 RUN apk add --no-cache npm
-RUN npm install --global prettier@3.1.0
+RUN --mount=type=tmpfs,target=/tmp --mount=type=cache,target=/npmcache,sharing=locked npm set cache /npmcache && npm install --global prettier@3.1.0