diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3c3c8f9..30a782d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.3.1] - 2021-11-09
+
+### Fixed
+
+* Memory orderings for aquireing and releasing BSEC have been slightly relaxed.
+* Memory orderings for the `FakeClock` (only used in tests) have been relaxed.
+
+
 ## [0.3.0] - 2021-05-15
 
 ### Added
@@ -40,8 +48,9 @@ Try to get documentation to build on docs.rs.
 Initial release.
 
 
-[Unreleased]: https://github.com/jgosmann/bsec/compare/v0.3.0...HEAD
-[0.3.0]: https://github.com/jgosmann/bsec/compare/v0.3.0...v0.3.0
+[Unreleased]: https://github.com/jgosmann/bsec/compare/v0.3.1...HEAD
+[0.3.0]: https://github.com/jgosmann/bsec/compare/v0.3.0...v0.3.1
+[0.3.0]: https://github.com/jgosmann/bsec/compare/v0.2.0...v0.3.0
 [0.2.0]: https://github.com/jgosmann/bsec/compare/v0.1.2...v0.2.0
 [0.1.2]: https://github.com/jgosmann/bsec/compare/v0.1.1...v0.1.2
 [0.1.1]: https://github.com/jgosmann/bsec/compare/v0.1.0...v0.1.1
diff --git a/Cargo.toml b/Cargo.toml
index 421c73a..5d92940 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,20 +1,20 @@
 [package]
-name = "bsec"
-version = "0.3.0"
 authors = ["Jan Gosmann <jan@hyper-world.de>"]
+categories = ["embedded"]
+description = "Rust API to the Bosch BSEC library."
 edition = "2018"
+keywords = ["bindings", "bsec"]
 license = "MIT OR Apache-2.0"
-description = "Rust API to the Bosch BSEC library."
-repository = "https://github.com/jgosmann/bsec"
+name = "bsec"
 readme = "README.md"
-keywords = ["bindings", "bsec"]
-categories = ["embedded"]
+repository = "https://github.com/jgosmann/bsec"
+version = "0.3.1"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-bme680 = { version = "0.5.1", optional = true }
-embedded-hal = { version = "0.2.5", optional = true }
+bme680 = {version = "0.5.1", optional = true}
+embedded-hal = {version = "0.2.5", optional = true}
 libalgobsec-sys = "0.1.0"
 nb = "1.0.0"
 
diff --git a/src/clock.rs b/src/clock.rs
index b3a08f5..43353bf 100644
--- a/src/clock.rs
+++ b/src/clock.rs
@@ -80,7 +80,10 @@ pub mod tests {
 /// This module is only available if the **test-support** feature is enabled.
 #[cfg(any(test, feature = "test-support"))]
 pub mod test_support {
-    use std::{sync::atomic::{AtomicI64, Ordering}, time::Duration};
+    use std::{
+        sync::atomic::{AtomicI64, Ordering},
+        time::Duration,
+    };
 
     use super::*;
 
@@ -114,14 +117,15 @@ pub mod test_support {
     impl Clock for FakeClock {
         /// Returns the current timestamp and advances it by one.
         fn timestamp_ns(&self) -> i64 {
-            self.timestamp_ns.fetch_add(1, Ordering::AcqRel)
+            self.timestamp_ns.fetch_add(1, Ordering::Relaxed)
         }
     }
 
     impl FakeClock {
         /// Advance the clock's internal time by `duration`.
         pub fn advance_by(&self, duration: Duration) {
-            self.timestamp_ns.fetch_add(duration.as_nanos() as i64, Ordering::AcqRel);
+            self.timestamp_ns
+                .fetch_add(duration.as_nanos() as i64, Ordering::Relaxed);
         }
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index 325d7e1..7a40518 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -229,7 +229,7 @@ impl<S: BmeSensor, C: Clock, B: Borrow<C>> Bsec<S, C, B> {
     /// * `clock`: [`Clock`] implementation to obtain timestamps.
     pub fn init(bme: S, clock: B) -> Result<Self, Error<S::Error>> {
         if BSEC_IN_USE
-            .compare_exchange(false, true, Ordering::AcqRel, Ordering::Relaxed)
+            .compare_exchange(false, true, Ordering::Acquire, Ordering::Relaxed)
             .is_ok()
         {
             unsafe {
@@ -479,7 +479,7 @@ impl<S: BmeSensor, C: Clock, B: Borrow<C>> Bsec<S, C, B> {
 
 impl<S: BmeSensor, C: Clock, B: Borrow<C>> Drop for Bsec<S, C, B> {
     fn drop(&mut self) {
-        BSEC_IN_USE.store(false, Ordering::SeqCst);
+        BSEC_IN_USE.store(false, Ordering::Release);
     }
 }