diff --git a/Readme.md b/Readme.md
index 3bb72b3..dfc0552 100644
--- a/Readme.md
+++ b/Readme.md
@@ -11,7 +11,7 @@ Use the [Nimble][2] package manager to add `contractabi` to an existing project.
 Add the following to its .nimble file:
 
 ```nim
-requires "contractabi >= 0.4.6 & < 0.5.0"
+requires "contractabi >= 0.5.0 & < 0.6.0"
 ```
 
 Usage
diff --git a/contractabi.nimble b/contractabi.nimble
index 5f72f99..e9cee72 100644
--- a/contractabi.nimble
+++ b/contractabi.nimble
@@ -1,4 +1,4 @@
-version = "0.4.6"
+version = "0.5.0"
 author = "Contract ABI Authors"
 description = "ABI Encoding for Ethereum contracts"
 license = "MIT"