diff --git a/API.txt b/API.txt
index 504a60ff3..070134959 100644
--- a/API.txt
+++ b/API.txt
@@ -453,8 +453,8 @@ option: Flag('all', autofill=True, cli_name='all', default=False, exclude='webui
 option: Flag('exactly?', autofill=True, default=False)
 option: Str('issuedon_from?', autofill=False)
 option: Str('issuedon_to?', autofill=False)
-option: Int('max_serial_number?', autofill=False, maxvalue=2147483647)
-option: Int('min_serial_number?', autofill=False, minvalue=0)
+option: Int('max_serial_number?', autofill=False, maxvalue=2147483647, minvalue=0)
+option: Int('min_serial_number?', autofill=False, maxvalue=2147483647, minvalue=0)
 option: Flag('raw', autofill=True, cli_name='raw', default=False, exclude='webui')
 option: Int('revocation_reason?', autofill=False, maxvalue=10, minvalue=0)
 option: Str('revokedon_from?', autofill=False)