diff --git a/ibus-m17n.spec b/ibus-m17n.spec
index 2136111..70df375 100644
--- a/ibus-m17n.spec
+++ b/ibus-m17n.spec
@@ -1,5 +1,5 @@
 Name:          ibus-m17n
-Version:       1.4.19
+Version:       1.4.20
 Release:       1mamba
 Summary:       M17N engine for IBus
 Group:         System/Libraries
@@ -22,8 +22,6 @@ BuildRequires: libharfbuzz-devel
 BuildRequires: libibus-devel
 BuildRequires: libm17n-devel
 BuildRequires: libpango-devel
-BuildRequires: libthai-devel
-BuildRequires: libz-devel
 ## AUTOBUILDREQ-END
 
 %description
@@ -80,6 +78,9 @@ fi
 %doc AUTHORS COPYING
 
 %changelog
+* Fri Aug 04 2023 Automatic Build System <autodist@mambasoft.it> 1.4.20-1mamba
+- automatic version update by autodist
+
 * Mon Feb 20 2023 Automatic Build System <autodist@mambasoft.it> 1.4.19-1mamba
 - automatic version update by autodist