diff --git a/docker/nginx.conf b/docker/nginx.conf
index 3be6ad5..f0a985d 100644
--- a/docker/nginx.conf
+++ b/docker/nginx.conf
@@ -36,6 +36,11 @@ http {
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_http_version 1.1;
 
+        # Serve robots.txt from the non-collected dir as a special case.
+        location /robots.txt {
+            alias /takahe/static/robots.txt;
+        }
+
         # Serves static files from the collected dir
         location /static/ {
             # Files in static have cache-busting hashes in the name, thus can be cached forever
diff --git a/static/robots.txt b/static/robots.txt
new file mode 100644
index 0000000..d910569
--- /dev/null
+++ b/static/robots.txt
@@ -0,0 +1,5 @@
+User-Agent: *
+
+# Don't allow any bot to crawl tags.
+Disallow: /tags/
+Disallow: /tags/*