diff --git a/playbooks/roles/mirror/templates/mirror.vhost.j2 b/playbooks/roles/mirror/templates/mirror.vhost.j2
index 44fa04e7fe..fe6e286df7 100644
--- a/playbooks/roles/mirror/templates/mirror.vhost.j2
+++ b/playbooks/roles/mirror/templates/mirror.vhost.j2
@@ -100,6 +100,7 @@ ErrorLogFormat "[%{cu}t] [%-m:%l] [pid %P:tid %T] %7F: %E: [client\ %a] %M% , \
     # Rewrite the locations of the actual files
     <Location /pypi>
       SetOutputFilter INFLATE;SUBSTITUTE;DEFLATE
+      SubstituteMaxLineLength 5m
       Substitute "s|https://files.pythonhosted.org/|/pypifiles/|ni"
     </Location>
 
@@ -251,6 +252,7 @@ ErrorLogFormat "[%{cu}t] [%-m:%l] [pid %P:tid %T] %7F: %E: [client\ %a] %M% , \
     # Rewrite the locations of the actual files
     <Location /pypi>
       SetOutputFilter INFLATE;SUBSTITUTE;DEFLATE
+      SubstituteMaxLineLength 5m
       Substitute "s|https://files.pythonhosted.org/|/pypifiles/|ni"
     </Location>