diff --git a/Dockerfile b/Dockerfile
index c0c8a33b..79aca0b7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,5 +14,5 @@ COPY selene-cpu.yml /tmp/$CONDA_ENV.yml
 RUN conda env create -q -f /tmp/selene.yml -n $CONDA_ENV && \
     bash -c '\
     source activate $CONDA_ENV && \
-    conda install -q nose sphinx==4.0.1 sphinx_rtd_theme==0.5.2 && \
+    conda install -c conda-forge -q nose sphinx==4.0.1 sphinx_rtd_theme==0.5.2 && \
     pip install recommonmark'