diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 385f080..25a7622 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1 +1 @@
-{".":"1.8.1"}
+{".":"1.9.0"}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a6eb673..7f3be11 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,67 @@
 # Changelog
 
+## [1.9.0](https://github.com/RicardoRyn/plotfig/compare/v1.8.1...v1.9.0) (2025-11-12)
+
+
+### Features ✨
+
+* **bar:** add one-sample t-test functionality ([00fdceb](https://github.com/RicardoRyn/plotfig/commit/00fdceb4b2b565fb33580a45f88f1ad5f5a8a258)), closes [#5](https://github.com/RicardoRyn/plotfig/issues/5)
+* **bar:** allow single-group bar plots to optionally show dots ([de2a2bb](https://github.com/RicardoRyn/plotfig/commit/de2a2bb5ab846041b380cf6225002575beb0406a))
+* **bar:** support color transparency adjustment via `color_alpha` argument ([530980d](https://github.com/RicardoRyn/plotfig/commit/530980dc346a338658d8333bb274004fcaac8d7d))
+* **bar:** support combining multiple statistical test methods ([34b6960](https://github.com/RicardoRyn/plotfig/commit/34b6960ff705468154bc5fbf75b9917ba8ac64fd))
+* **bar:** 增加函数绘制多组bar图 ([d740fbe](https://github.com/RicardoRyn/plotfig/commit/d740fbec2534fd91f660ca183323fdf014c5537a))
+* **bar:** 每个独立的样本点都能够指定颜色 ([8c0f297](https://github.com/RicardoRyn/plotfig/commit/8c0f297c7a6c847e53db3ee3f2719568ff644d72))
+* **bar:** 能够绘制间渐变色的bar图，设置bar边框颜色 ([02d163f](https://github.com/RicardoRyn/plotfig/commit/02d163ffbe0b0d51cb7c7b59ca7d75b71da4ed9d))
+* **circos:** add support for changing node label orientation via `node_label_orientation` ([abb7746](https://github.com/RicardoRyn/plotfig/commit/abb77465b33ea91d1a23592436b27d400799995f))
+* **circos:** Implement a new method for drawing circos plots ([ebf3352](https://github.com/RicardoRyn/plotfig/commit/ebf3352491566817fc6202c1a9323e9f6e8a323a))
+* **connec:** Add `line_color` parameter to customize connection line colors ([e4de41e](https://github.com/RicardoRyn/plotfig/commit/e4de41effe495767cde0980ce5e2cee458d8b3a8))
+* **connection:** add batch image cropping and GIF creation utilities ([f6554aa](https://github.com/RicardoRyn/plotfig/commit/f6554aaac27549428b10646d11a646b93ce389af))
+* **connection:** 可为脑连接html文件截图 ([5172a89](https://github.com/RicardoRyn/plotfig/commit/5172a890cea45b3405c3fb4a2048fc0d81295c4b))
+* **connection:** 增加函数绘制玻璃大脑连接图 ([43ac5e5](https://github.com/RicardoRyn/plotfig/commit/43ac5e53f92b37b03b475c95fd930cb79cbfeb45)), closes [#1](https://github.com/RicardoRyn/plotfig/issues/1)
+* **connection:** 现在默认不显示没有任何连接的节点 ([25c9e0d](https://github.com/RicardoRyn/plotfig/commit/25c9e0de1dd89ccec9755a2b365f1746778cf8ee)), closes [#2](https://github.com/RicardoRyn/plotfig/issues/2)
+* **corr:** 在绘制相关点线图时，允许用正六边形展示大量散点的分布密度 ([8e25741](https://github.com/RicardoRyn/plotfig/commit/8e25741fa2337eb8e356f4ae5467ac782b2f0311))
+* **corr:** 现在可以手动选择是否显示p值 ([d93e719](https://github.com/RicardoRyn/plotfig/commit/d93e71946cb802b949097e0d5b5fb560e561b05b))
+* **surface:** 增加函数绘制猕猴D99图集的脑区图 ([ae33f94](https://github.com/RicardoRyn/plotfig/commit/ae33f94319aa7e4fcb849c11624523da01cbb6ab))
+* **surface:** 增加函数绘制黑猩猩BNA图集脑图 ([95aaae1](https://github.com/RicardoRyn/plotfig/commit/95aaae12cf0b9b5c43a7259ecd39dbffdefab515))
+* **utils:** Add several utility functions ([b59f2a4](https://github.com/RicardoRyn/plotfig/commit/b59f2a49a6683e8ce942f47a2adc2a79a94e6f84))
+* **violin:** add function to plot single-group violin fig ([5c15b21](https://github.com/RicardoRyn/plotfig/commit/5c15b2172ab6df3eb40722f33374abcc606b9be5))
+* **violin:** add function to plot single-group violin fig ([8b2884b](https://github.com/RicardoRyn/plotfig/commit/8b2884bdb7eb2a839c46e673e3f29901ec433722))
+* **连接:** 添加 `line_color` 参数以自定义连接线颜色 ([e4de41e](https://github.com/RicardoRyn/plotfig/commit/e4de41effe495767cde0980ce5e2cee458d8b3a8))
+
+
+### Bug Fixes 🔧
+
+* **bar:** fix bug causing multi_bar plot failure ([a797006](https://github.com/RicardoRyn/plotfig/commit/a797006ed7b0598f65ff14f29d1c4c0280b1d811))
+* **bar:** fix the statistic line color not displaying as expected ([51489d4](https://github.com/RicardoRyn/plotfig/commit/51489d4231711f756e24203dd25b70e8128fc89f))
+* **bar:** handle empty significance plot without error ([a048ef2](https://github.com/RicardoRyn/plotfig/commit/a048ef272e40cdc85be99adcb4dfc11911abf964))
+* **bar:** isolate random number generator inside function ([a423c90](https://github.com/RicardoRyn/plotfig/commit/a423c90a3ba6ecdd0950ca10de6e61e9bb94fd64))
+* **bar:** remove leftover debug print in bar functions ([37f6f4c](https://github.com/RicardoRyn/plotfig/commit/37f6f4cfe55ed7ad0578040838f09f5966ce89cf))
+* **bar:** rename `y_lim_range` to `y_lim` in `plot_one_group_bar_figure` ([8d18d3a](https://github.com/RicardoRyn/plotfig/commit/8d18d3ad24708c0de621cf0fddc7e3382992895c))
+* **circos:** prevent type warning from type annotations ([b3552da](https://github.com/RicardoRyn/plotfig/commit/b3552dafd21fe72d9a294e0a52b8dc286d6a108e))
+* **connec:** Fix color bug caused by integer values ([b104c1f](https://github.com/RicardoRyn/plotfig/commit/b104c1f985c4aeaf1576c716fc1f0b7725774e26))
+* **connec:** fix issue with line_color display under color scale ([83d46d7](https://github.com/RicardoRyn/plotfig/commit/83d46d7031c49a455ab2648a92193ae5278750f4))
+* **deps:** update surfplot dependency info to use GitHub version ([de4ad0c](https://github.com/RicardoRyn/plotfig/commit/de4ad0ce889b418a788659e6f700eebc34a02a33))
+* **deps:** use the correct version of surfplot ([7467c20](https://github.com/RicardoRyn/plotfig/commit/7467c200f46af37a7ad0cac6aef464d1e24d9ef8))
+* **matrix:** 改成返回None ([b7d1b8d](https://github.com/RicardoRyn/plotfig/commit/b7d1b8d8cabbc0e57bd3245baccbcb71a5edfda8))
+* **surface:** 修复函数并非仅返回fig的bug ([e0eb9f7](https://github.com/RicardoRyn/plotfig/commit/e0eb9f7fc2fba3ab02ca880c012445f22fd6c22d))
+* **surface:** 修复当值为0的情况下，脑区不显示的bug ([ba792de](https://github.com/RicardoRyn/plotfig/commit/ba792dee52827fa5643adc48934e2155e7dcd1ad))
+
+
+### Code Refactoring ♻️
+
+* **bar:** mark string input for `test_method` as planned for deprecation ([e56d6d7](https://github.com/RicardoRyn/plotfig/commit/e56d6d7b79104b6079619b73158e21ee284a5304))
+* **bar:** Remove the legacy `plot_one_group_violin_figure_old` function ([6d1316d](https://github.com/RicardoRyn/plotfig/commit/6d1316d3050279f849d5c941ff6280c0ce419145))
+* **bar:** rename arguments in plot_one_group_bar_figure ([22a19cb](https://github.com/RicardoRyn/plotfig/commit/22a19cb35b46b334ee0498b740d085f3a0591dc8))
+* **bar:** replace print with warnings.warn ([3560d64](https://github.com/RicardoRyn/plotfig/commit/3560d64bf41237cbbc9311eb380665133b803d7b))
+* **bar:** 将 `test_method` 的字符串输入标记为即将弃用 ([e56d6d7](https://github.com/RicardoRyn/plotfig/commit/e56d6d7b79104b6079619b73158e21ee284a5304))
+* **circos:** Temporarily disable circos plot ([a96bb09](https://github.com/RicardoRyn/plotfig/commit/a96bb09cc799ce34785146f6bd855631ae1ad73a))
+* **corr/matrix:** function now returns Axes object ([e47cada](https://github.com/RicardoRyn/plotfig/commit/e47cada18a411fe28f7dc8a6ef62dea00acd3888))
+* **corr:** change default ax title font size in correlation plots to 12 ([5aab9fe](https://github.com/RicardoRyn/plotfig/commit/5aab9fe082f05894379c90b7e7a4a5a3a4739c49))
+* **src:** 重构代码，更加可读，易维护 ([d50e40d](https://github.com/RicardoRyn/plotfig/commit/d50e40d45a20b0c355553f1634eac9bdcca74d39))
+* **surface:** Deprecate old functions ([d90dc92](https://github.com/RicardoRyn/plotfig/commit/d90dc927731cd369d2ac1cc0939556b13d54158c))
+* **surface:** unify brain surface plotting with new plot_brain_surface_figure ([b566e23](https://github.com/RicardoRyn/plotfig/commit/b566e23cf435197dc4ca4da418f09cdc8641829d))
+* **tests:** remove unused tests folder ([b4a2b69](https://github.com/RicardoRyn/plotfig/commit/b4a2b697ed9d5c976bf3cf5858f67d7033cc3aa3))
+
 ## [1.8.1](https://github.com/RicardoRyn/plotfig/compare/v1.8.0...v1.8.1) (2025-10-29)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 9988354..a46772c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "plotfig"
-version = "1.8.1"
+version = "1.9.0"
 description = "Scientific plotting package for Cognitive neuroscience"
 keywords = ["neuroscience", "plotting", "visualization"]
 readme = "README.md"