diff --git a/README.md b/README.md
index b10e284..dd2f269 100644
--- a/README.md
+++ b/README.md
@@ -202,7 +202,7 @@ respective missing value.
 
 ## Release Notes
 
-### 2.2.0 (2023-11-08)
+### 2.2.1 (2023-11-08)
 
 - Added option for splitting output into multiple files by vertical grid used.
 - Improved documentation and manual page.
diff --git a/mrr2c.1 b/mrr2c.1
index 9381191..d9738a3 100644
--- a/mrr2c.1
+++ b/mrr2c.1
@@ -1,4 +1,4 @@
-.TH mrr2c 1 2023-11-08 "mrr2c 2.2.0"
+.TH mrr2c 1 2023-11-08 "mrr2c 2.2.1"
 .
 .SH NAME
 mrr2c \- convert Metek MRR-2 data files to NetCDF
diff --git a/mrr2c.py b/mrr2c.py
index f5e5aaf..266ca3b 100644
--- a/mrr2c.py
+++ b/mrr2c.py
@@ -13,7 +13,7 @@
 import ds_format as ds
 import aquarius_time as aq
 
-__version__ = '2.2.0'
+__version__ = '2.2.1'
 
 NA_INT64 = -9223372036854775808
 
diff --git a/setup.py b/setup.py
index ab6b283..ab194f3 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name='mrr2c',
-    version='2.2.0',
+    version='2.2.1',
     packages=find_packages(),
     py_modules=['mrr2c'],
     entry_points={