diff --git a/project.clj b/project.clj
index b770914..56a93d2 100644
--- a/project.clj
+++ b/project.clj
@@ -1,4 +1,4 @@
-(defproject clj-test-containers "0.3.0"
+(defproject clj-test-containers "0.4.0-SNAPSHOT"
   :description "A lightweight, unofficial wrapper around the Testcontainers Java library"
 
   :url "https://github.com/javahippie/clj-test-containers"