diff --git a/atbuild/src/main.swift b/atbuild/src/main.swift
index 2397c16..03f7b14 100644
--- a/atbuild/src/main.swift
+++ b/atbuild/src/main.swift
@@ -18,7 +18,7 @@ import Glibc
 import Darwin
 #endif
 
-let version = "1.9.0"
+let version = "1.9.1"
 
 import atfoundation
 import atpkg
diff --git a/build.atpkg b/build.atpkg
index 763bc16..b94a457 100644
--- a/build.atpkg
+++ b/build.atpkg
@@ -17,7 +17,7 @@
 (package
   :name "atbuild"
   :import-packages ["atpkg/build.atpkg"]
-  :version "1.9.0"
+  :version "1.9.1"
   :tasks {
     :atbuild {
       :tool "atllbuild"