diff --git a/CHANGELOG b/CHANGELOG
index ccf98ee777cdbc26b7f1007292ad7506aa420091..3657b019f5db8705340e57e71fdef5e9b3e76b38 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+# 0.3.9
+- Fix bug #11 (off-target sequence uppper)
+
 # 0.3.8
 - Fix bug shift one nucleotide for guide sequence
 - Add guide positions on input target sequence
diff --git a/pyproject.toml b/pyproject.toml
index cf91571069d6323564f187e76e38ef857b20e93a..264aa0c75e020b742ea343cf2acf6e227770b54d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "crisprbact"
-version = "0.3.8"
+version = "0.3.9"
 license = "GPL-3.0"
 description = "Tools to design and analyse CRISPRi experiments"
 authors = ["David Bikard <david.bikard@pasteur.fr>", "Remi Planel <rplanel@pasteur.fr>"]