diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5afc865..95b62ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,9 @@
 # Changelog
 
-## Unreleased
+## v4.0.0 - 27.05.2026
 
 - Resolve misleading IPv6 support documentation.
+- Rename `enable_ipv6` to `force_ipv6`.
 
 ## v3.0.8 - 21.04.2026
 
diff --git a/README.md b/README.md
index d78b659..215515d 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ ewe [/juː/] - fluffy package for building web servers.
 ## Installation
 
 ```sh
-gleam add ewe@3 gleam_erlang gleam_otp gleam_http logging
+gleam add ewe@4 gleam_erlang gleam_otp gleam_http logging
 ```
 
 ## Getting Started
diff --git a/examples/manifest.toml b/examples/manifest.toml
index 264834b..27c2db5 100644
--- a/examples/manifest.toml
+++ b/examples/manifest.toml
@@ -3,13 +3,13 @@
 
 packages = [
   { name = "compresso", version = "0.1.0", build_tools = ["gleam"], requirements = ["exception", "gleam_erlang", "gleam_stdlib", "gleam_yielder", "logging"], otp_app = "compresso", source = "hex", outer_checksum = "8BE29A1EDA42F70826ED148EAE40C46BB3FC18E78FE472663DB01DD4A38172D4" },
-  { name = "ewe", version = "3.0.8", build_tools = ["gleam"], requirements = ["compresso", "exception", "gleam_erlang", "gleam_http", "gleam_otp", "gleam_stdlib", "glisten", "logging", "websocks"], source = "local", path = ".." },
+  { name = "ewe", version = "4.0.0", build_tools = ["gleam"], requirements = ["compresso", "exception", "gleam_erlang", "gleam_http", "gleam_otp", "gleam_stdlib", "glisten", "logging", "websocks"], source = "local", path = ".." },
   { name = "exception", version = "2.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "exception", source = "hex", outer_checksum = "329D269D5C2A314F7364BD2711372B6F2C58FA6F39981572E5CA68624D291F8C" },
   { name = "gleam_crypto", version = "1.6.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_crypto", source = "hex", outer_checksum = "2DE9E4EF53CF6FEE049D4F765731F7178F7A11AEFAE00EEE63BF7536B354AD3F" },
   { name = "gleam_erlang", version = "1.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "1124AD3AA21143E5AF0FC5CF3D9529F6DB8CA03E43A55711B60B6B7B3874375C" },
   { name = "gleam_http", version = "4.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_http", source = "hex", outer_checksum = "82EA6A717C842456188C190AFB372665EA56CE13D8559BF3B1DD9E40F619EE0C" },
   { name = "gleam_otp", version = "1.2.0", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_stdlib"], otp_app = "gleam_otp", source = "hex", outer_checksum = "BA6A294E295E428EC1562DC1C11EA7530DCB981E8359134BEABC8493B7B2258E" },
-  { name = "gleam_stdlib", version = "1.0.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "960090C2FB391784BB34267B099DC9315CC1B1F6013E7415BC763CEF1905D7D3" },
+  { name = "gleam_stdlib", version = "1.0.2", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "0C5506589DF4C63DF5D6FFBB834562D6865C6C2AEE0019D7B37886BD6D128141" },
   { name = "gleam_yielder", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_yielder", source = "hex", outer_checksum = "8E4E4ECFA7982859F430C57F549200C7749823C106759F4A19A78AEA6687717A" },
   { name = "gleeunit", version = "1.10.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "254B697FE72EEAD7BF82E941723918E421317813AC49923EE76A18C788C61E72" },
   { name = "glisten", version = "9.0.1", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_otp", "gleam_stdlib", "logging"], otp_app = "glisten", source = "hex", outer_checksum = "7795AA50830656F3A0316A6B26595F893C83272DA901B3405E31339CAA31A10B" },
diff --git a/examples/src/sse.gleam b/examples/src/sse.gleam
index b58b3c9..2f5d549 100644
--- a/examples/src/sse.gleam
+++ b/examples/src/sse.gleam
@@ -135,7 +135,10 @@ fn pubsub_worker(
   })
 }
 
-fn handle_pubsub_message(clients: List(Subject(String)), message: PubSubMessage) {
+fn handle_pubsub_message(
+  clients: List(Subject(String)),
+  message: PubSubMessage,
+) {
   case message {
     Subscribe(client) -> {
       let assert Ok(pid) = process.subject_owner(client)
diff --git a/gleam.toml b/gleam.toml
index c504ed2..4dbba55 100644
--- a/gleam.toml
+++ b/gleam.toml
@@ -1,13 +1,11 @@
 name = "ewe"
-version = "3.0.8"
+version = "4.0.0"
 
 description = "🐑 a fluffy Gleam web server"
 target = "erlang"
 licences = ["Apache-2.0"]
 repository = { type = "github", user = "vshakitskiy", repo = "ewe" }
-links = [
-  { title = "Gleam", href = "https://gleam.run" },
-]
+links = [{ title = "Gleam", href = "https://gleam.run" }]
 
 [dependencies]
 gleam_stdlib = ">= 1.0.0 and < 2.0.0"