diff --git a/.github/release-please-manifest.json b/.github/release-please-manifest.json
index e18ee07..466df71 100644
--- a/.github/release-please-manifest.json
+++ b/.github/release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.0.0"
+  ".": "0.1.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..7628a88
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,5 @@
+# Changelog
+
+## 0.1.0 (2026-06-10)
+
+Initial release
diff --git a/src/timeutil.c b/src/timeutil.c
index 1b1e2fd..69c204a 100644
--- a/src/timeutil.c
+++ b/src/timeutil.c
@@ -270,7 +270,7 @@ extern "C"
 #endif
 TIMEUTIL_EXPORT int luaopen_timeutil(lua_State *L) {
   timeutil_newlib(L, timeutil_functions);
-  lua_pushliteral(L, "timeutil 0.0.0"); /* x-release-please-version */
+  lua_pushliteral(L, "timeutil 0.1.0"); /* x-release-please-version */
   lua_setfield(L, -2, "_VERSION");
   return 1;
 }
diff --git a/types/timeutil.d.lua b/types/timeutil.d.lua
index 0ca7a9d..0529792 100644
--- a/types/timeutil.d.lua
+++ b/types/timeutil.d.lua
@@ -1,6 +1,6 @@
 ---@meta timeutil
 
-local version = "timeutil 0.0.0" -- x-release-please-version
+local version = "timeutil 0.1.0" -- x-release-please-version
 
 ---
 ---Wall-clock time, monotonic time, and native sleep utilities.