diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9751688..1810207 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 
 ## Unreleased
+### ...
+- ...
+
+
+
+## [3.3.4] - 2018-09-21
 ### Added
 - `czi_to_tiff`: to convert CZI files to TIFF.
 - `gpseq_fromfish_merge`
@@ -393,6 +399,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 
 [Unreleased] https://github.com/ggirelli/gpseq-img-py
+[3.3.4] https://github.com/ggirelli/gpseq-img-py/releases/tag/v3.3.4
 [3.3.3] https://github.com/ggirelli/gpseq-img-py/releases/tag/v3.3.3
 [3.3.2] https://github.com/ggirelli/gpseq-img-py/releases/tag/v3.3.2
 [3.3.1] https://github.com/ggirelli/gpseq-img-py/releases/tag/v3.3.1
diff --git a/README.md b/README.md
index 40b5934..818cded 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-pyGPSeq v3.3.3
+pyGPSeq v3.3.4
 ===
 
 A Python3 package that provides tools to analyze images of GPSeq samples.
diff --git a/setup.py b/setup.py
index f4c754e..2bba5d7 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@
 	long_description = f.read()
 
 setup(name='pygpseq',
-	version='3.3.3',
+	version='3.3.4',
 	description='A GPSeq image analysis package',
 	long_description=long_description,
 	long_description_content_type='text/markdown',