diff --git a/CHANGELOG.md b/CHANGELOG.md
index cb493b6c..d3c1f1c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 The change log describes what is "Added", "Removed", "Changed" or "Fixed" between each release.
 
+# unreleased
+
+- Deprecated `Http\Client\HttpClient` in favor of `Psr\Http\Client\ClientInterface` (#425).
+- Added `Psr\Http\Client\ClientInterface` service (#425).
+
 # 1.27.1 - 2023-03-03
 
 - Added `: void` to `Collector::reset` to avoid PHP warning.
diff --git a/src/Resources/config/services.xml b/src/Resources/config/services.xml
index a839d134..fbc7775b 100644
--- a/src/Resources/config/services.xml
+++ b/src/Resources/config/services.xml
@@ -47,7 +47,10 @@
         <service id="httplug.client.default" class="Http\Client\HttpClient">
             <factory class="Http\Discovery\HttpClientDiscovery" method="find" />
         </service>
-        <service id="Http\Client\HttpClient" alias="httplug.client" public="false" />
+        <service id="Http\Client\HttpClient" alias="httplug.client" public="false">
+            <deprecated package="php-http/httplug-bundle" version="1.28" />
+        </service>
+        <service id="Psr\Http\Client\ClientInterface" alias="httplug.client" public="false" />
 
         <!-- Discovery for PSR-18 -->
         <service id="httplug.psr18_client.default" class="Psr\Http\Client\ClientInterface">