diff --git a/Cargo.lock b/Cargo.lock
index 6d817a4ff..9510ca2eb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1677,7 +1677,7 @@ checksum = "447660ad36a13288b1db4d4248e857b510e8c3a225c822ba4fb748c0aafecffd"
 
 [[package]]
 name = "wit-bindgen"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "bitflags",
  "wit-bindgen-rust-macro",
@@ -1685,7 +1685,7 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-c"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "clap",
@@ -1699,7 +1699,7 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-cli"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "clap",
@@ -1720,7 +1720,7 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-core"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "wit-component",
@@ -1729,7 +1729,7 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-go"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "clap",
  "heck",
@@ -1741,7 +1741,7 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-markdown"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "clap",
  "heck",
@@ -1752,7 +1752,7 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-rust"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "clap",
  "heck",
@@ -1766,7 +1766,7 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-rust-lib"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "heck",
  "wit-bindgen-core",
@@ -1774,7 +1774,7 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-rust-macro"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "proc-macro2",
@@ -1786,7 +1786,7 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-teavm-java"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "clap",
  "heck",
diff --git a/Cargo.toml b/Cargo.toml
index 509062644..d1d0a8888 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "wit-bindgen-cli"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
-version = "0.3.0"
+version = "0.4.0"
 edition = { workspace = true }
 repository = 'https://github.com/bytecodealliance/wit-bindgen'
 license = "Apache-2.0 WITH LLVM-exception"
@@ -35,14 +35,14 @@ wat = "1.0.61"
 wit-parser = "0.6.3"
 wit-component = "0.7.2"
 
-wit-bindgen-core = { path = 'crates/core', version = '0.3.0' }
-wit-bindgen-c = { path = 'crates/c', version = '0.3.0' }
-wit-bindgen-rust = { path = "crates/rust", version = "0.3.0" }
-wit-bindgen-teavm-java = { path = 'crates/teavm-java', version = '0.3.0' }
-wit-bindgen-go = { path = 'crates/go', version = '0.1.0' }
-wit-bindgen-markdown = { path = 'crates/markdown', version = '0.3.0' }
-wit-bindgen-rust-lib = { path = 'crates/rust-lib', version = '0.3.0' }
-wit-bindgen = { path = 'crates/guest-rust', version = '0.3.0', default-features = false }
+wit-bindgen-core = { path = 'crates/core', version = '0.4.0' }
+wit-bindgen-c = { path = 'crates/c', version = '0.4.0' }
+wit-bindgen-rust = { path = "crates/rust", version = "0.4.0" }
+wit-bindgen-teavm-java = { path = 'crates/teavm-java', version = '0.4.0' }
+wit-bindgen-go = { path = 'crates/go', version = '0.2.0' }
+wit-bindgen-markdown = { path = 'crates/markdown', version = '0.4.0' }
+wit-bindgen-rust-lib = { path = 'crates/rust-lib', version = '0.4.0' }
+wit-bindgen = { path = 'crates/guest-rust', version = '0.4.0', default-features = false }
 wit-bindgen-rust-macro-shared = { path = 'crates/rust-macro-shared', version = '0.3.0' }
 
 [[bin]]
diff --git a/ci/publish.rs b/ci/publish.rs
index 5b6d34dee..3872e2dfd 100644
--- a/ci/publish.rs
+++ b/ci/publish.rs
@@ -30,6 +30,7 @@ const CRATES_TO_PUBLISH: &[&str] = &[
     "wit-bindgen-rust-lib",
     "wit-bindgen-c",
     "wit-bindgen-rust",
+    "wit-bindgen-go",
     "wit-bindgen-teavm-java",
     "wit-bindgen-markdown",
     "wit-bindgen-rust-macro",
diff --git a/crates/c/Cargo.toml b/crates/c/Cargo.toml
index 1d10caa3b..236d759bf 100644
--- a/crates/c/Cargo.toml
+++ b/crates/c/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "wit-bindgen-c"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
-version = "0.3.0"
+version = "0.4.0"
 edition.workspace = true
 repository = 'https://github.com/bytecodealliance/wit-bindgen'
 license = "Apache-2.0 WITH LLVM-exception"
diff --git a/crates/core/Cargo.toml b/crates/core/Cargo.toml
index a3673b5ec..3d5d1d9ec 100644
--- a/crates/core/Cargo.toml
+++ b/crates/core/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "wit-bindgen-core"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
-version = "0.3.0"
+version = "0.4.0"
 edition.workspace = true
 repository = 'https://github.com/bytecodealliance/wit-bindgen'
 license = "Apache-2.0 WITH LLVM-exception"
diff --git a/crates/go/Cargo.toml b/crates/go/Cargo.toml
index 34ab2a55a..e598d185c 100644
--- a/crates/go/Cargo.toml
+++ b/crates/go/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "wit-bindgen-go"
 authors = ["Mossaka <duibao55328@gmail.com>"]
-version = "0.1.0"
+version = "0.2.0"
 edition.workspace = true
 repository = 'https://github.com/bytecodealliance/wit-bindgen'
 license = "Apache-2.0 WITH LLVM-exception"
diff --git a/crates/guest-rust/Cargo.toml b/crates/guest-rust/Cargo.toml
index fecd2fa2d..640d68937 100644
--- a/crates/guest-rust/Cargo.toml
+++ b/crates/guest-rust/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "wit-bindgen"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
-version = "0.3.0"
+version = "0.4.0"
 edition.workspace = true
 repository = 'https://github.com/bytecodealliance/wit-bindgen'
 license = "Apache-2.0 WITH LLVM-exception"
@@ -12,7 +12,7 @@ Used when compiling Rust programs to the component model.
 """
 
 [dependencies]
-wit-bindgen-rust-macro = { path = "../rust-macro", optional = true, version = "0.3.0" }
+wit-bindgen-rust-macro = { path = "../rust-macro", optional = true, version = "0.4.0" }
 bitflags = { workspace = true }
 
 [features]
diff --git a/crates/markdown/Cargo.toml b/crates/markdown/Cargo.toml
index 1f86f0830..e1c4f3610 100644
--- a/crates/markdown/Cargo.toml
+++ b/crates/markdown/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "wit-bindgen-markdown"
-version = "0.3.0"
+version = "0.4.0"
 edition.workspace = true
 repository = 'https://github.com/bytecodealliance/wit-bindgen'
 license = "Apache-2.0 WITH LLVM-exception"
diff --git a/crates/rust-lib/Cargo.toml b/crates/rust-lib/Cargo.toml
index 6057a5fc7..12b327cdd 100644
--- a/crates/rust-lib/Cargo.toml
+++ b/crates/rust-lib/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "wit-bindgen-rust-lib"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
-version = "0.3.0"
+version = "0.4.0"
 edition.workspace = true
 repository = 'https://github.com/bytecodealliance/wit-bindgen'
 license = "Apache-2.0 WITH LLVM-exception"
diff --git a/crates/rust-macro/Cargo.toml b/crates/rust-macro/Cargo.toml
index 1bf337d7b..45c47406c 100644
--- a/crates/rust-macro/Cargo.toml
+++ b/crates/rust-macro/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "wit-bindgen-rust-macro"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
-version = "0.3.0"
+version = "0.4.0"
 edition.workspace = true
 repository = 'https://github.com/bytecodealliance/wit-bindgen'
 license = "Apache-2.0 WITH LLVM-exception"
diff --git a/crates/rust/Cargo.toml b/crates/rust/Cargo.toml
index 8acc01177..3649fe42a 100644
--- a/crates/rust/Cargo.toml
+++ b/crates/rust/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "wit-bindgen-rust"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
-version = "0.3.0"
+version = "0.4.0"
 edition.workspace = true
 repository = 'https://github.com/bytecodealliance/wit-bindgen'
 license = "Apache-2.0 WITH LLVM-exception"
diff --git a/crates/teavm-java/Cargo.toml b/crates/teavm-java/Cargo.toml
index 49a47e45c..cb72cef19 100644
--- a/crates/teavm-java/Cargo.toml
+++ b/crates/teavm-java/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "wit-bindgen-teavm-java"
-version = "0.3.0"
+version = "0.4.0"
 edition.workspace = true
 repository = 'https://github.com/bytecodealliance/wit-bindgen'
 license = "Apache-2.0 WITH LLVM-exception"