symfony
diff --git a/‎components/string.rst
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@@ -8,6 +8,10 @@ The String Component
     The String component provides a single object-oriented API to work with
     three "unit systems" of strings: bytes, code points and grapheme clusters.
 
+.. versionadded:: 5.0
+
+    The String component was introduced in Symfony 5.0.
+
 Installation
 ------------