diff --git a/Dockerfile b/Dockerfile
index 42e4040..3ef9a44 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -88,7 +88,7 @@ RUN echo "deb-src http://deb.debian.org/debian buster main contrib" >> /etc/apt/
     && cp src/acl/external/unix_group/ext_unix_group_acl /usr/lib/squid/ \
     && cp src/store/id_rewriters/file/storeid_file_rewrite /usr/lib/squid/ \
     && cp src/DiskIO/DiskDaemon/diskd /usr/lib/squid/ \
-    && cp errors /usr/share/squid/ \
+    && cp -r errors /usr/share/squid/ \
     && cp -r icons /usr/share/squid/ \
     && cp src/squid /usr/sbin/ \
     && cp tools/squidclient/squidclient /usr/sbin/ \