diff --git a/Cargo.toml b/Cargo.toml
index 8a208b6..020d11d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,7 @@ name = "symbolica"
 readme = "Readme.md"
 repository = "https://github.com/benruijl/symbolica"
 rust-version = "1.73"
-version = "0.3.0"
+version = "0.4.0"
 
 [profile.release]
 codegen-units = 1
diff --git a/Readme.md b/Readme.md
index 9107d6a..b2d3d70 100644
--- a/Readme.md
+++ b/Readme.md
@@ -62,7 +62,7 @@ If you want to use Symbolica as a library in Rust, simply include it in the `Car
 
 ```toml
 [dependencies]
-symbolica = "0.3"
+symbolica = "0.4"
 ```
 
 # Examples
diff --git a/pyproject.toml b/pyproject.toml
index a64833b..7a542c4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ keywords = ["math", "algebra", "polynomial", "expression", "manipulation"]
 license = {file = "License.md"}
 name = "symbolica"
 readme = "Readme.md"
-version = "0.3.0"
+version = "0.4.0"
 
 classifiers = [
   "Development Status :: 3 - Alpha",