Bump version after release
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 017f7cf..d42303a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,7 +6,7 @@
 endif()
 
 project(libzip
-  VERSION 1.7.3
+  VERSION 1.7.3.1
   LANGUAGES C)
 
 option(ENABLE_COMMONCRYPTO "Enable use of CommonCrypto" ON)