diff --git a/docker/Dockerfile b/docker/Dockerfile
index 707c342..c213bc1 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -40,6 +40,7 @@ RUN apt-get update && apt-get install -qy --no-install-recommends $BUILD_DEPS ${
   echo "Install toolchain" && \
   rustup target add $(cat /arch)-${TARGET_SUFFIX} && \
   echo "Building rpxy from source" && \
+  cargo update &&\
   cargo build --release --target=$(cat /arch)-${TARGET_SUFFIX} ${CARGO_FEATURES} && \
   strip --strip-all /tmp/target/$(cat /arch)-${TARGET_SUFFIX}/release/rpxy &&\
   cp /tmp/target/$(cat /arch)-${TARGET_SUFFIX}/release/rpxy /tmp/target/release/rpxy
diff --git a/docker/Dockerfile-slim b/docker/Dockerfile-slim
index 0aa69cc..b58a408 100644
--- a/docker/Dockerfile-slim
+++ b/docker/Dockerfile-slim
@@ -25,6 +25,7 @@ COPY . /tmp/
 ENV RUSTFLAGS "-C link-arg=-s"
 
 RUN echo "Building rpxy from source" && \
+  cargo update && \
   cargo build --release --target $(cat /arch)-unknown-linux-musl ${CARGO_FEATURES} && \
   musl-strip --strip-all /tmp/target/$(cat /arch)-unknown-linux-musl/release/rpxy && \
   cp /tmp/target/$(cat /arch)-unknown-linux-musl/release/rpxy /tmp/target/release/rpxy