diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4f9a15..8981296 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,10 +2,6 @@
 
 ## Unreleased
 
-## v0.1.1 (2025-01-18)
-
-* Fix a deadlock in tests
-
 ## v0.1.0 (2025-01-18)
 
 * First version
diff --git a/LICENSE b/LICENSE
index 576c9bd..1339f84 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,12 +1,10 @@
-MIT License
-
-Copyright (c) 2021-2025 Bruno Carlin
+MIT License Copyright (c) 2021 Bruno Carlin
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell c
+pies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in all
diff --git a/cache.go b/cache.go
index 7c068f7..b23880e 100644
--- a/cache.go
+++ b/cache.go
@@ -23,13 +23,14 @@ func (e entry[V]) isExpired() bool {
 // Cache is an in-memory key-value store.
 type Cache[K comparable, V any] struct {
 	data map[K]entry[V]
-	mu   sync.RWMutex
+	mu   *sync.RWMutex
 }
 
 // New instantiate a new cache.
 func New[K comparable, V any]() *Cache[K, V] {
 	return &Cache[K, V]{
 		data: make(map[K]entry[V]),
+		mu:   &sync.RWMutex{},
 	}
 }
 
@@ -46,6 +47,9 @@ func (c *Cache[K, V]) Put(key K, val V) {
 //
 // A 0 ttl value disables the expiration of the value.
 func (c *Cache[K, V]) PutTTL(key K, val V, ttl time.Duration) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
 	if ttl == 0 {
 		c.Put(key, val)
 
@@ -54,9 +58,6 @@ func (c *Cache[K, V]) PutTTL(key K, val V, ttl time.Duration) {
 
 	exp := time.Now().Add(ttl)
 
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
 	c.data[key] = entry[V]{&exp, val}
 }