diff --git a/docker/README.md b/docker/README.md
index 06db59f..fdc6c18 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -29,6 +29,7 @@ The running container can be configured through different environment variables:
 - `BACKENDS_ALLOWALL_SECRET`: Secret when `BACKENDS_ALLOWALL` is enabled.
 - `BACKENDS`: Space-separated list of backend ids.
 - `BACKENDS_TIMEOUT`: Timeout in seconds for requests to backends.
+- `CONNECTIONS_PER_HOST`: Maximum number of concurrent backend connections per host.
 - `BACKEND_<ID>_URL`: Url of backend `ID` (where `ID` is the uppercase backend id).
 - `BACKEND_<ID>_SHARED_SECRET`: Shared secret for backend `ID` (where `ID` is the uppercase backend id).
 - `BACKEND_<ID>_SESSION_LIMIT`: Optional session limit for backend `ID` (where `ID` is the uppercase backend id).
diff --git a/docker/server/entrypoint.sh b/docker/server/entrypoint.sh
index dfd073d..f9e4a16 100755
--- a/docker/server/entrypoint.sh
+++ b/docker/server/entrypoint.sh
@@ -252,6 +252,10 @@ if [ ! -f "$CONFIG" ]; then
     sed -i "/requests to the backend/,/requests to the backend/ s|^timeout =.*|timeout = $BACKENDS_TIMEOUT|" "$CONFIG"
   fi
 
+  if [ -n "$CONNECTIONS_PER_HOST" ]; then
+    sed -i "s|connectionsperhost =.*|connectionsperhost = $CONNECTIONS_PER_HOST|" "$CONFIG"
+  fi
+
   if [ -n "$BACKENDS" ]; then
     BACKENDS_CONFIG=${BACKENDS// /,}
     sed -i "s|#backends = .*|backends = $BACKENDS_CONFIG|" "$CONFIG"