diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2db484a..0a51da7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -15,7 +15,7 @@ stages:
 
 spellcheck:
   stage: orthography
-  image: docker.io/library/node:16.2
+  image: docker.io/library/node:16.4
   before_script:
     - npm i -g markdown-spellcheck
   script:
diff --git a/_docker/Dockerfile b/_docker/Dockerfile
index fbd42ed..f8456e8 100644
--- a/_docker/Dockerfile
+++ b/_docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/library/nginx:1.20.0-alpine
+FROM docker.io/library/nginx:1.21.1-alpine
 
 COPY ./public/ /usr/share/nginx/html/