diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 2d2b6b2..77e8cb2 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1 +1 @@
-{".":"1.20.0"}
+{".":"1.21.0"}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 63891b4..58afc12 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.21.0](https://github.com/RicardoRyn/plotfig/compare/v1.20.0...v1.21.0) (2026-05-20)
+
+
+### Features ✨
+
+* **single_bar:** add box plot function ([c29009c](https://github.com/RicardoRyn/plotfig/commit/c29009cee4b82423672f1fa086f1a83b2d672008))
+
 ## [1.20.0](https://github.com/RicardoRyn/plotfig/compare/v1.19.0...v1.20.0) (2026-05-13)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 6a5b488..223eb8d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "plotfig"
-version = "1.20.0"
+version = "1.21.0"
 description = "Scientific plotting package for Cognitive neuroscience"
 keywords = ["neuroscience", "plotting", "visualization"]
 readme = "README.md"