diff --git a/libursa/Version.h.in b/libursa/Version.h.in
index 877ca09..aefb917 100644
--- a/libursa/Version.h.in
+++ b/libursa/Version.h.in
@@ -9,5 +9,5 @@ constexpr std::string_view ursadb_format_version = "1.5.0";
 // Project version.
 // Consider updating the version tag when doing PRs.
 // clang-format off
-constexpr std::string_view ursadb_version_string = "@PROJECT_VERSION@+opt8";
+constexpr std::string_view ursadb_version_string = "@PROJECT_VERSION@+opt9";
 // clang-format on