diff --git a/Dockerfile b/Dockerfile
index 2a40ef5..5753698 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM curlimages/curl:8.16.0
+FROM curlimages/curl:8.16.0@sha256:463eaf6072688fe96ac64fa623fe73e1dbe25d8ad6c34404a669ad3ce1f104b6
 
 COPY entrypoint.sh /entrypoint.sh