diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9368454..00565fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
 ## Pending
+- [\#47](https://github.com/arkworks-rs/std/pull/47) Fix incorrect use of atomic variable in `src/perf_trace.rs`
 
 ### Breaking changes
 
@@ -8,17 +9,6 @@
 
 ### Bug fixes
 
-## v0.5.0
-
-### Breaking changes
-
-### Features
-
-### Improvements
-
-### Bug fixes
-- [\#47](https://github.com/arkworks-rs/std/pull/47) Fix incorrect use of atomic variable in `src/perf_trace.rs`
-
 ## v0.4.0
 
 ### Breaking changes
diff --git a/Cargo.toml b/Cargo.toml
index 78f59df..96c9237 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ark-std"
-version = "0.5.0"
+version = "0.4.0"
 authors = [ "arkworks contributors" ]
 description = "A library for no_std compatibility"
 homepage = "https://arkworks.rs"