diff --git a/Dockerfile b/Dockerfile
index 24eab9fc..564e8d66 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,7 +27,7 @@ RUN npm run build
 #########################################
 # Package static build files into nginx #
 #########################################
-FROM nginxinc/nginx-unprivileged:stable-alpine@sha256:458ecbec226a23120713b35945bcdf0d6e4ea5bbec60c149ce1deca5d264071b AS cyberchef
+FROM nginxinc/nginx-unprivileged:stable-alpine@sha256:fd3314e343bad2de4e1127ef58be122abbfa7e09572fa46ae62fcddb6b3f21c5 AS cyberchef
 
 LABEL maintainer="GCHQ <oss@gchq.gov.uk>"