diff --git a/certbot-apache/certbot_apache/_internal/configurator.py b/certbot-apache/certbot_apache/_internal/configurator.py
index ca5b41ddc..a70ab437b 100644
--- a/certbot-apache/certbot_apache/_internal/configurator.py
+++ b/certbot-apache/certbot_apache/_internal/configurator.py
@@ -266,7 +266,7 @@ class ApacheConfigurator(common.Installer):
             logger.warning("Unable to read ssl_module file; not disabling session tickets.")
             return None
         # looks like: OpenSSL 1.0.2s  28 May 2019
-        matches = re.findall(b"OpenSSL ([0-9]\.[^ ]+) ", contents)
+        matches = re.findall(br"OpenSSL ([0-9]\.[^ ]+) ", contents)
         if not matches:
             logger.warning("Could not find OpenSSL version; not disabling session tickets.")
             return None