diff --git a/Dockerfile b/Dockerfile
index 24751a9..14ee4e6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,7 +25,7 @@ SHELL ["conda", "run", "-n", "funannotate", "/bin/bash", "-c"]
 RUN python -m pip install git+https://github.com/nextgenusfs/funannotate.git
 
 # package with conda-pack
-RUN conda-pack -n funannotate -o /tmp/env.tar && \
+RUN conda-pack --ignore-missing-files -n funannotate -o /tmp/env.tar && \
     mkdir /venv && cd /venv && tar xf /tmp/env.tar && \
     rm /tmp/env.tar
 
diff --git a/funannotate/__version__.py b/funannotate/__version__.py
index 50fbd01..aaae2ea 100644
--- a/funannotate/__version__.py
+++ b/funannotate/__version__.py
@@ -1,3 +1,3 @@
-VERSION = (1, 8, 12)
+VERSION = (1, 8, 13)
 
 __version__ = '.'.join(map(str, VERSION))