diff --git a/docker/Dockerfile.cc-analysis-ubuntu b/docker/Dockerfile.cc-analysis-ubuntu
index 8031f9d0..10b6d1d9 100644
--- a/docker/Dockerfile.cc-analysis-ubuntu
+++ b/docker/Dockerfile.cc-analysis-ubuntu
@@ -89,6 +89,8 @@ RUN mkdir $HOME/work && \
 # Dask dependencies and HTCondor
 RUN mamba install --yes \
     -c conda-forge \
+    python==3.8.18 \
+    tornado==6.3.3 \
     htcondor \
     xgboost \
     pyhf \