diff --git a/.changes/refactor-problem.md b/.changes/refactor-problem.md
deleted file mode 100644
index 8d88545..0000000
--- a/.changes/refactor-problem.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-"algohub-server": patch:feat
----
-
-Refactor problem strucutre to support multiple test cases and safely handle input/output files.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f926b64..93a24d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## \[0.1.9]
+
+### New Features
+
+- [`2af9a74`](https://github.com/swpu-acm/online-judge/commit/2af9a745bd51c7a831aa3fd98b0ba6cf08b49e03) ([#40](https://github.com/swpu-acm/online-judge/pull/40) by [@fu050409](https://github.com/swpu-acm/online-judge/../../fu050409)) Refactor problem strucutre to support multiple test cases and safely handle input/output files.
+
 ## \[0.1.8]
 
 ### New Features
diff --git a/Cargo.toml b/Cargo.toml
index 6c18477..199b59a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "algohub-server"
-version = "0.1.8"
+version = "0.1.9"
 edition = "2021"
 description = "Extremely fast async online judge backend based on Rust"
 readme = "README.md"