diff --git a/.hgtags b/.hgtags
index 98841df..76cbf94 100644
--- a/.hgtags
+++ b/.hgtags
@@ -4,3 +4,4 @@ c39094588d1a84e6308a67c1f9839f57076899cc v0.1.1
 9c89a11d03f788f4f783a5a84636c9e05354bd6c v0.2.1
 0822baccbb0b40972aee951e876133b49e494f8c v0.3.0
 8d8d8b9cce95871b84ed841905d2763dba715b95 v0.3.2
+bad4df6dc0e35990ff62f7325decc94cef53ac18 v0.3.3
diff --git a/History.md b/History.md
index b04537e..1588f41 100644
--- a/History.md
+++ b/History.md
@@ -1,5 +1,19 @@
 # Release History for MDBX
 
+---
+## v0.3.3 [2021-10-22] Mahlon E. Smith <mahlon@martini.nu>
+
+Bugfixes:
+
+ - Close any open transactions if serialization functions fail.
+ - Don't use functions that assume NUL is the stream terminator.
+
+
+Enhancements:
+
+ - Add Loggability for debug output.
+
+
 ---
 ## v0.3.2 [2021-07-13] Mahlon E. Smith <mahlon@martini.nu>