pin version of sorl-thumbnail
@@ -10,7 +10,7 @@ RUN pip install pytest-cov
RUN pip install --upgrade rdflib==5.0.0
RUN pip install -e git+https://github.com/hydroshare/hsmodels.git@0.5.0#egg=hsmodels
-RUN pip install sorl-thumbnail
+RUN pip install sorl-thumbnail==12.8.0
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
