diff --git a/nghttp2.spec b/nghttp2.spec
index 97e9b17..e50de83 100644
--- a/nghttp2.spec
+++ b/nghttp2.spec
@@ -1,5 +1,5 @@
 Name:          nghttp2
-Version:       1.55.0
+Version:       1.55.1
 Release:       1mamba
 Summary:       An implementation of the Hypertext Transfer Protocol version 2 in C
 Group:         System/Libraries
@@ -95,6 +95,9 @@ This package contains libraries and header files for developing applications tha
 %{_libdir}/pkgconfig/libnghttp2.pc
 
 %changelog
+* Sat Jul 15 2023 Automatic Build System <autodist@mambasoft.it> 1.55.1-1mamba
+- automatic version update by autodist
+
 * Thu Jul 13 2023 Automatic Build System <autodist@mambasoft.it> 1.55.0-1mamba
 - automatic version update by autodist