diff --git a/Dockerfile b/Dockerfile
index 0784495..9d9dc7e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,7 @@ RUN apt-get update && \
 USER ${AVATAO_USER}
 
 COPY .pyenvrc /home/${AVATAO_USER}/.pyenvrc
-ENV PYTHON_VERSION="3.6.3"
+ENV PYTHON_VERSION="3.6.4"
 RUN curl -L https://raw.githubusercontent.com/pyenv/pyenv-installer/master/bin/pyenv-installer | bash && \
     echo "source $HOME/.pyenvrc" >> "$HOME/.bashrc" && \
     . "$HOME/.pyenvrc" && \