diff --git a/container/Singularity b/container/Singularity
index d66131adf2d38ebab6d27a323c8094cc5d01cb8f..004c139ef5b6f8609e9649036e6844c71db0a21d 100644
--- a/container/Singularity
+++ b/container/Singularity
@@ -14,6 +14,7 @@ ln -sf /bin/bash /bin/sh
 # INSTALL SYSTEM DEPS
 #####################
 apt-get update -y && apt-get install -y python3-pip
+pip3 install ipywidgets==7.6.0
 pip3 install nglview \
              ipython \
              jupyter