diff --git a/.changes/7.x/unreleased/Fixed-20240102-144034.yaml b/.changes/7.x/unreleased/Fixed-20240102-144034.yaml
new file mode 100644
index 00000000..4536ae1b
--- /dev/null
+++ b/.changes/7.x/unreleased/Fixed-20240102-144034.yaml
@@ -0,0 +1,4 @@
+kind: Fixed
+body: '[#368](https://github.com/llaville/php-compatinfo/issues/368) : clarify documentation
+  about `ext-pdo` requirement'
+time: 2024-01-02T14:40:34.195297678Z
diff --git a/docs/installation.md b/docs/installation.md
index 75cf5ebf..fb39497e 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -13,7 +13,8 @@
 
 * PHP 8.0 or greater
 * ext-json
-* ext-pcre
+* ext-pcre (required by: bartlett/php-compatinfo-db)
+* ext-pdo (required by: bartlett/php-compatinfo-db)
 * ext-spl
 * PHPUnit 9 or greater (if you want to run unit tests)