diff --git a/Dockerfile b/Dockerfile
index 787df90..c737518 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,8 +9,8 @@ ARG PIP_TRUSTED_HOST=127.0.0.1
 ENV DEVPI_VERSION $DEVPI_VERSION
 
 RUN NO_PROXY=$PIP_TRUSTED_HOST pip --trusted-host $PIP_TRUSTED_HOST install -i $PIP_INDEX_URL --upgrade \
-  "devpi-client>=2.3.0,<2.4" \
-  "devpi-server==$DEVPI_VERSION"
+  "devpi-client>=2.3" "requests>=2.9.0" \
+  "devpi-server==$DEVPI_VERSION"		+  "devpi-server==${DEVPI_VERSION:-2.5.3}"
 
 EXPOSE 3141
 VOLUME /data