diff --git a/README.md b/README.md
index 0b8afb0..f80a2f0 100644
--- a/README.md
+++ b/README.md
@@ -8,11 +8,11 @@ A logging library for the [Duct][] framework.
 
 Add the following dependency to your deps.edn file:
 
-    org.duct-framework/logger {:mvn/version "0.3.0"}
+    org.duct-framework/logger {:mvn/version "0.4.0"}
 
 Or to your Leiningen project file:
 
-    [org.duct-framework/logger "0.3.0"]
+    [org.duct-framework/logger "0.4.0"]
 
 ## Usage
 
diff --git a/project.clj b/project.clj
index d1f72fc..f9f4363 100644
--- a/project.clj
+++ b/project.clj
@@ -1,4 +1,4 @@
-(defproject org.duct-framework/logger "0.3.0"
+(defproject org.duct-framework/logger "0.4.0"
   :description "Logging library for the Duct framework"
   :url "https://github.com/duct-framework/logger"
   :license {:name "Eclipse Public License"