diff --git a/CHANGES.md b/CHANGES.md
index 0e45b98..fc8a5ee 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -15,6 +15,14 @@
 
 <!-- towncrier release notes start -->
 
+## v1.0.0 (2023-09-14)
+
+### Breaking change
+* Now it requires Python 3.11 to work!
+
+### Features
+* Implement the full version of secure, encrypted RPC communication based on ZeroMQ's ZAP protocol using CURVE keypairs ([#21](https://github.com/lablup/callosum/issues/21))
+
 
 ## v0.9.10 (2022-02-17)
 
diff --git a/changes/21.feature.md b/changes/21.feature.md
deleted file mode 100644
index f9f0daf..0000000
--- a/changes/21.feature.md
+++ /dev/null
@@ -1 +0,0 @@
-Implement the full version of secure, encrypted RPC communication based on ZeroMQ's ZAP protocol using CURVE keypairs
diff --git a/changes/template.md b/changes/template.md
index 94ed349..5130f7e 100644
--- a/changes/template.md
+++ b/changes/template.md
@@ -1,6 +1,6 @@
 {% if top_line %}
 {{ top_line }}
-{{ versiondata.version }} ({{ versiondata.date }})
+v{{ versiondata.version }} ({{ versiondata.date }})
 {% endif %}
 {%- for section, _ in sections.items() -%}
   {%- if sections[section] -%}