diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07c89615..f0e37bca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 10.4.3
+
+### Changes
+
+- **Bumped the `mailsuite` floor to `>=2.3.1`**, picking up the fix for `mailsuite.utils.parse_email()` raising `TypeError` instead of `ValueError("Not an email")` on unparseable (non-email) input under mail-parser 4.6.2 and later ([seanthegeek/mailsuite#61](https://github.com/seanthegeek/mailsuite/issues/61)) — a potential crash for anything reading non-email files through that API. mail-parser 4.6.2 changed its contract for unparseable input (it now returns a header-less parse result instead of the input string), so mailsuite's not-an-email detection never fired and parsing crashed on the missing `From` header. Every install of the previous parsedmarc release shipped the affected combination, because mailsuite 2.3.0 — the floor since parsedmarc 10.4.2 — itself requires mail-parser `>=4.6.2`. parsedmarc's own CLI and library report parsing never call that mailsuite API; they use parsedmarc's separate `parse_email` implementation, which rejects non-email input gracefully and behaves identically under both mailsuite versions, so this bump removes the affected combination from installs rather than fixing a parsedmarc crash.
+
 ## 10.4.2
 
 ### Changes
diff --git a/parsedmarc/constants.py b/parsedmarc/constants.py
index f480d17c..6bec07c3 100644
--- a/parsedmarc/constants.py
+++ b/parsedmarc/constants.py
@@ -1,4 +1,4 @@
-__version__ = "10.4.2"
+__version__ = "10.4.3"
 
 USER_AGENT = f"parsedmarc/{__version__}"
 
diff --git a/pyproject.toml b/pyproject.toml
index 23f1b8d7..42822b06 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,7 @@ dependencies = [
     "httpx>=0.25",
     "kafka-python>=2.3.2",
     "lxml>=4.4.0",
-    "mailsuite[gmail,msgraph]>=2.3.0",
+    "mailsuite[gmail,msgraph]>=2.3.1",
     "maxminddb>=2.0.0",
     # Imported directly in cli.py for Graph error handling; otherwise
     # only a transitive dep of mailsuite[msgraph] -> msgraph-sdk.