diff --git a/changelog.d/9405.misc b/changelog.d/9405.misc
new file mode 100644
index 0000000000..d82c3b832f
--- /dev/null
+++ b/changelog.d/9405.misc
@@ -0,0 +1 @@
+Add rustc as a dependency when building Docker images.
diff --git a/docker/Dockerfile b/docker/Dockerfile
index afd896ffc1..d619ee08ed 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -28,11 +28,13 @@ RUN apt-get update && apt-get install -y \
     libwebp-dev \
     libxml++2.6-dev \
     libxslt1-dev \
+    rustc \
     zlib1g-dev \
  && rm -rf /var/lib/apt/lists/*
 
 # Build dependencies that are not available as wheels, to speed up rebuilds
 RUN pip install --prefix="/install" --no-warn-script-location \
+        cryptography \
         frozendict \
         jaeger-client \
         opentracing \