diff --git a/Dockerfile b/Dockerfile
index 82cee67..a42d5eb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -33,9 +33,9 @@ RUN chown -R nginx:nginx /usr/share/nginx/html && \
 # Expose port 80
 EXPOSE 80
 
-# Health check
+# Health check (127.0.0.1 to avoid IPv6 localhost when nginx listens on IPv4 only)
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-  CMD wget --quiet --tries=1 --spider http://localhost/ || exit 1
+  CMD wget --quiet --tries=1 --spider http://127.0.0.1/ || exit 1
 
 # Run nginx in foreground
 CMD ["nginx", "-g", "daemon off;"]
diff --git a/docker-compose.yml b/docker-compose.yml
index b19c1a1..862e870 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -10,7 +10,7 @@ services:
     pull_policy: always
     restart: unless-stopped
     healthcheck:
-      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost/"]
+      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://127.0.0.1/"]
       interval: 30s
       timeout: 3s
       start_period: 5s