diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c22219..948e64a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 9.0.9
+
+### Fixes
+
+- Validate that a string is base64-encoded before trying to base64 decode it. (PRs #648 and #649)
+
 ## 9.0.8
 
 ### Fixes
diff --git a/parsedmarc/constants.py b/parsedmarc/constants.py
index 7af7de6..4ce60b5 100644
--- a/parsedmarc/constants.py
+++ b/parsedmarc/constants.py
@@ -1,3 +1,3 @@
-__version__ = "9.0.8"
+__version__ = "9.0.9"
 
 USER_AGENT = f"parsedmarc/{__version__}"