diff --git a/Dockerfile b/Dockerfile
index 4c9c94124fffbb97a013682fcaa14da5489d66ec..374a6e614b01100dd43686ebc6be7e71dba35cad 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,7 +15,7 @@ RUN seqdb_vers="1.0" && \
     tar -xzf /seqdb.tar.gz && \
     rm /seqdb.tar.gz && \
     echo "export PATH=/seqdb-${seqdb_vers}/:\$PATH" >> ~/.bashrc && \
-    source ~/.bashrc
+    . ~/.bashrc
 
 # create a conda env for each yaml config
 RUN CONDA_DIR="/opt/conda" && \