diff --git a/history.md b/history.md
index feb2570..b7b1165 100644
--- a/history.md
+++ b/history.md
@@ -1,3 +1,6 @@
+# 0.9.1 (2023-05-17)
+* add `mtime=0` to `gzip.compress` call for reproducible builds
+
 # 0.9.0 (2022-08-04)
 * use gzip to compress pickle artifacts
 
diff --git a/pytest_automock/__init__.py b/pytest_automock/__init__.py
index 5b4b826..a2a75d3 100644
--- a/pytest_automock/__init__.py
+++ b/pytest_automock/__init__.py
@@ -2,5 +2,5 @@
 
 from .mock import *
 
-__version__ = "0.9.0"
+__version__ = "0.9.1"
 version = tuple(map(int, __version__.split(".")))