diff --git a/Cargo.lock b/Cargo.lock
index 8a45053..64d5674 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -189,7 +189,7 @@ checksum = "0688c2a7f92e427f44895cd63841bff7b29f8d7a1648b9e7e07a4a365b2e1257"
 
 [[package]]
 name = "dsmr-rs"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "config",
  "log",
diff --git a/Cargo.toml b/Cargo.toml
index ee2cc89..4db60c7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "dsmr-rs"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Maarten Mulders <mthmulders@noreply.github.com>"]
 edition = "2018"
 description = "A utility to ship 'smart meter' readings over HTTP"