diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d098b0..52f1162 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 Changelog
 =========
 
+8.18.5
+------
+
+- Fix CSV download
+
 8.18.4
 ------
 
diff --git a/parsedmarc/constants.py b/parsedmarc/constants.py
index 039f3dc..bf39084 100644
--- a/parsedmarc/constants.py
+++ b/parsedmarc/constants.py
@@ -1,2 +1,2 @@
-__version__ = "8.18.4"
+__version__ = "8.18.5"
 USER_AGENT = f"parsedmarc/{__version__}"
diff --git a/parsedmarc/utils.py b/parsedmarc/utils.py
index 571cca5..12cb636 100644
--- a/parsedmarc/utils.py
+++ b/parsedmarc/utils.py
@@ -345,8 +345,12 @@ def get_service_from_reverse_dns_base_domain(
     if not (offline or always_use_local_file) and len(reverse_dns_map) == 0:
         try:
             logger.debug(f"Trying to fetch reverse DNS map from {url}...")
-            headers = {"User-Agent", USER_AGENT}
+            headers = {"User-Agent": USER_AGENT}
             response = requests.get(url, headers=headers)
+            logging.debug("Response headers:")
+            response_headers = response.headers
+            for header in response_headers:
+                logger.debug(f"{header}: {response_headers[header]}")
             response.raise_for_status()
             csv_file.write(response.text)
             csv_file.seek(0)
@@ -356,6 +360,7 @@ def get_service_from_reverse_dns_base_domain(
         except Exception:
             logger.warning("Not a valid CSV file")
             csv_file.seek(0)
+            logging.debug("Response body:")
             logger.debug(csv_file.read())
 
     if len(reverse_dns_map) == 0: