diff --git a/cwlex.Dockerfile b/cwlex.Dockerfile
index ef18edd..8f76790 100644
--- a/cwlex.Dockerfile
+++ b/cwlex.Dockerfile
@@ -1,4 +1,4 @@
-from node:slim
+from node:17.4-slim
 
 COPY cwl-ex-1.0.0.tgz /root