diff --git a/CHANGELOG.md b/CHANGELOG.md
index 70026d5..1d84c28 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changes
 
-## [Unreleased]
+## [v1.9.1] - 2023-11-25
 
 - Fixed support for writing comments.
 
diff --git a/README.md b/README.md
index 17c8eac..6e89e41 100644
--- a/README.md
+++ b/README.md
@@ -46,14 +46,15 @@ and writing NEXUS
 >>> print(Nexus.from_blocks(Data.from_data(nex.CHARACTERS.get_matrix())))
 #NEXUS
 BEGIN DATA;
-	DIMENSIONS NCHAR=10;
-	FORMAT DATATYPE=STANDARD MISSING=? GAP=- SYMBOLS="01";
-	MATRIX 
-    t1 1001010000
-    t2 0101000100
-    t3 0011101010
-    t4 0001100001
-    t5 0001100001;
+DIMENSIONS NCHAR=10;
+FORMAT DATATYPE=STANDARD MISSING=? GAP=- SYMBOLS="01";
+MATRIX 
+t1 1001010000
+t2 0101000100
+t3 0011101010
+t4 0001100001
+t5 0001100001
+;
 END;
 ```
 
diff --git a/docs/conf.py b/docs/conf.py
index ce7b8d7..d128837 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -9,7 +9,7 @@
 project = 'commonnexus'
 copyright = '2023, Robert Forkel'
 author = 'Robert Forkel'
-release = '1.9.1.dev0'
+release = '1.9.1'
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
diff --git a/setup.cfg b/setup.cfg
index a7a98fb..c070705 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = commonnexus
-version = 1.9.1.dev0
+version = 1.9.1
 author = Robert Forkel
 author_email = robert_forkel@eva.mpg.de
 description = A nexus (phylogenetics) file reader and writer (.nex, .trees)
diff --git a/src/commonnexus/__init__.py b/src/commonnexus/__init__.py
index f79089f..1e9ac32 100644
--- a/src/commonnexus/__init__.py
+++ b/src/commonnexus/__init__.py
@@ -1,4 +1,4 @@
 from .nexus import Nexus, Config  # noqa: F401
 from commonnexus.blocks import Block  # noqa: F401
 
-__version__ = '1.9.1.dev0'
+__version__ = '1.9.1'