diff --git a/Dockerfile b/Dockerfile
index eed9167..4c062a0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -118,7 +118,7 @@
 #    dpkg -i cuda-repo-ubuntu1804-11-7-local_11.7.0-515.43.04-1_amd64.deb && \
 #    cp /var/cuda-repo-ubuntu1804-11-7-local/cuda-*-keyring.gpg /usr/share/keyrings/
 
-RUN cd /tmp && \
+RUN cd /tmp && apt-get update && \
     wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-ubuntu1804.pin && \
     mv cuda-ubuntu1804.pin /etc/apt/preferences.d/cuda-repository-pin-600 && \
     wget https://developer.download.nvidia.com/compute/cuda/11.8.0/local_installers/cuda-repo-ubuntu1804-11-8-local_11.8.0-520.61.05-1_amd64.deb && \