diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e5547b..7c1f205 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ This file only calls out major changes. Please see [the list of Git commits](
 https://github.com/api7/nginx-lua-prometheus/commits/main) for the full list
 of changes.
 
+## 1.1.1
+
+- Update a metric's pending increment in place instead of allocating a new
+  entry on every `incr()` before `sync()`, which removes the per-call
+  allocation for counters and histogram observations (#28).
+
 ## 1.1.0
 
 - Reuse expired index slots while their dictionary nodes still exist, avoid
diff --git a/dist.ini b/dist.ini
index c349c88..4bfd9b4 100644
--- a/dist.ini
+++ b/dist.ini
@@ -1,6 +1,6 @@
 name = nginx-lua-prometheus-api7
 abstract = Prometheus metric library for Nginx
-version = 1.1.0
+version = 1.1.1
 author = Anton Tolchanov
 is_original = no
 license = mit
diff --git a/rockspec/nginx-lua-prometheus-api7-1.1.0-1.rockspec b/rockspec/nginx-lua-prometheus-api7-1.1.1-1.rockspec
similarity index 94%
rename from rockspec/nginx-lua-prometheus-api7-1.1.0-1.rockspec
rename to rockspec/nginx-lua-prometheus-api7-1.1.1-1.rockspec
index 2d18850..3fbc842 100644
--- a/rockspec/nginx-lua-prometheus-api7-1.1.0-1.rockspec
+++ b/rockspec/nginx-lua-prometheus-api7-1.1.1-1.rockspec
@@ -1,11 +1,11 @@
 -- Note, this file must have version in its name
 -- (see https://github.com/knyar/nginx-lua-prometheus/issues/27)
 package = "nginx-lua-prometheus-api7"
-version = "1.1.0-1"
+version = "1.1.1-1"
 
 source = {
   url = "git+https://github.com/api7/nginx-lua-prometheus.git",
-  tag = "1.1.0",
+  tag = "1.1.1",
 }
 
 description = {