diff --git a/prometheus-client/CHANGELOG.md b/prometheus-client/CHANGELOG.md
index b4e4a99..8e95ee7 100644
--- a/prometheus-client/CHANGELOG.md
+++ b/prometheus-client/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Change Log
 
+## 1.0.0.1 -- 2020-05-27
+
+- Optimizations to improve memory usage.
+
 ## 1.0.0 -- 2018-08-10
 
 Version 1.0.0 is a significant rewrite of some core parts of the API, as
diff --git a/prometheus-client/prometheus-client.cabal b/prometheus-client/prometheus-client.cabal
index b2e89cb..83e23d7 100644
--- a/prometheus-client/prometheus-client.cabal
+++ b/prometheus-client/prometheus-client.cabal
@@ -1,5 +1,5 @@
 name:                prometheus-client
-version:             1.0.0
+version:             1.0.0.1
 synopsis:            Haskell client library for http://prometheus.io.
 description:         Haskell client library for http://prometheus.io.
 homepage:            https://github.com/fimad/prometheus-haskell