diff --git a/docker/Dockerfile b/docker/Dockerfile
index 263e0224..b2aa15c3 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,3 @@
 FROM ghcr.io/cyclus/cymetric_22.04_conda/cymetric:latest
 
-RUN mamba update -y --all
 RUN mamba install -y sphinx sphinxcontrib-bibtex cloud_sptheme