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+PHP GNUPG UPGRADING NOTES
+
+This document lists backward incompatible change in the extension
+
+1.4.0
+- gnupg_decryptverify $plaintext reference cannot be longer passed in
+  call_user_func_array which is conformant to user space code.
+  See https://github.com/php-gnupg/php-gnupg/issues/4 for more details.
+