diff --git a/Dockerfile b/Dockerfile
index 8772a14..a54aadf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -70,7 +70,7 @@ RUN pip3 install neuron==8.0.1
 
 RUN git clone https://github.com/openworm/c302.git && \
   cd c302 && \
-  git checkout ow-0.9.3 && \
+  git checkout ow-0.9.3a && \
   sudo pip install .
 
 # Note: pyNeuroML installed with the above library