diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e5e0a0..057ec25 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@
   (These interfaces use the `Interface` suffix to avoid name collisions.)
 - Added an interface for HttpClientPool and moved the abstract class to the HttpClientPool sub namespace.
 - AddPathPlugin: Do not add the prefix if the URL already has the same prefix.
+- All exceptions in `Http\Client\Common\Exception` are final.
 
 ### Removed
 - Deprecated option `debug_plugins` has been removed from `PluginClient`
diff --git a/src/Exception/CircularRedirectionException.php b/src/Exception/CircularRedirectionException.php
index de2063e..9db927c 100644
--- a/src/Exception/CircularRedirectionException.php
+++ b/src/Exception/CircularRedirectionException.php
@@ -11,6 +11,6 @@
  *
  * @author Joel Wurtz <joel.wurtz@gmail.com>
  */
-class CircularRedirectionException extends HttpException
+final class CircularRedirectionException extends HttpException
 {
 }
diff --git a/src/Exception/ClientErrorException.php b/src/Exception/ClientErrorException.php
index 1b187e7..c657a3f 100644
--- a/src/Exception/ClientErrorException.php
+++ b/src/Exception/ClientErrorException.php
@@ -11,6 +11,6 @@
  *
  * @author Joel Wurtz <joel.wurtz@gmail.com>
  */
-class ClientErrorException extends HttpException
+final class ClientErrorException extends HttpException
 {
 }
diff --git a/src/Exception/HttpClientNotFoundException.php b/src/Exception/HttpClientNotFoundException.php
index 5f16053..509daa5 100644
--- a/src/Exception/HttpClientNotFoundException.php
+++ b/src/Exception/HttpClientNotFoundException.php
@@ -11,6 +11,6 @@
  *
  * @author Joel Wurtz <joel.wurtz@gmail.com>
  */
-class HttpClientNotFoundException extends TransferException
+final class HttpClientNotFoundException extends TransferException
 {
 }
diff --git a/src/Exception/LoopException.php b/src/Exception/LoopException.php
index e84053c..f4e173f 100644
--- a/src/Exception/LoopException.php
+++ b/src/Exception/LoopException.php
@@ -11,6 +11,6 @@
  *
  * @author Joel Wurtz <joel.wurtz@gmail.com>
  */
-class LoopException extends RequestException
+final class LoopException extends RequestException
 {
 }
diff --git a/src/Exception/MultipleRedirectionException.php b/src/Exception/MultipleRedirectionException.php
index 4c7814e..bf6c9f7 100644
--- a/src/Exception/MultipleRedirectionException.php
+++ b/src/Exception/MultipleRedirectionException.php
@@ -11,6 +11,6 @@
  *
  * @author Joel Wurtz <joel.wurtz@gmail.com>
  */
-class MultipleRedirectionException extends HttpException
+final class MultipleRedirectionException extends HttpException
 {
 }
diff --git a/src/Exception/ServerErrorException.php b/src/Exception/ServerErrorException.php
index 1ad2552..774b97f 100644
--- a/src/Exception/ServerErrorException.php
+++ b/src/Exception/ServerErrorException.php
@@ -11,6 +11,6 @@
  *
  * @author Joel Wurtz <joel.wurtz@gmail.com>
  */
-class ServerErrorException extends HttpException
+final class ServerErrorException extends HttpException
 {
 }