diff --git a/devcontainer/Dockerfile b/devcontainer/Dockerfile
index d73386dab..c15d51978 100644
--- a/devcontainer/Dockerfile
+++ b/devcontainer/Dockerfile
@@ -7,8 +7,9 @@ ARG NIX_INSTALL_SCRIPT=https://nixos.org/nix/install
 COPY --chmod=0755 nix-entrypoint.sh /nix-entrypoint.sh
 COPY nix.conf /tmp/nix.conf
 
-# Install dependencies
-RUN apt-get install -y bash curl git sudo xz-utils
+# Update and install dependencies
+RUN apt-get update && \
+    apt-get install -y bash curl git sudo xz-utils
 
 # Install Nix
 # NOTE: The extra conf file does not apply to the install script itself.