diff --git a/Cargo.toml b/Cargo.toml
index 33c78234..588a6c15 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [workspace.package]
-version = "3.6.0"
+version = "4.0.0-rc2"
 
 [workspace]
 resolver = "2"
diff --git a/conjure-codegen/Cargo.toml b/conjure-codegen/Cargo.toml
index 19d6e893..70fbd4b0 100644
--- a/conjure-codegen/Cargo.toml
+++ b/conjure-codegen/Cargo.toml
@@ -25,7 +25,7 @@ toml = "0.8"
 serde = { version = "1", features = ["derive"] }
 syn = "2"
 
-conjure-object = { version = "3.6.0", path = "../conjure-object" }
-conjure-serde = { version = "3.6.0", path = "../conjure-serde" }
-conjure-error = { version = "3.6.0", optional = true, path = "../conjure-error" }
-conjure-http = { version = "3.6.0", optional = true, path = "../conjure-http" }
+conjure-object = { version = "4.0.0-rc2", path = "../conjure-object" }
+conjure-serde = { version = "4.0.0-rc2", path = "../conjure-serde" }
+conjure-error = { version = "4.0.0-rc2", optional = true, path = "../conjure-error" }
+conjure-http = { version = "4.0.0-rc2", optional = true, path = "../conjure-http" }
diff --git a/conjure-error/Cargo.toml b/conjure-error/Cargo.toml
index 68215385..4decb40c 100644
--- a/conjure-error/Cargo.toml
+++ b/conjure-error/Cargo.toml
@@ -12,4 +12,4 @@ readme = "../README.md"
 serde = "1.0"
 uuid = { version = "1.1", features = ["v4"] }
 
-conjure-object = { version = "3.6.0", path = "../conjure-object" }
+conjure-object = { version = "4.0.0-rc2", path = "../conjure-object" }
diff --git a/conjure-http/Cargo.toml b/conjure-http/Cargo.toml
index b9e9277f..b262e078 100644
--- a/conjure-http/Cargo.toml
+++ b/conjure-http/Cargo.toml
@@ -14,10 +14,10 @@ macros = ["dep:conjure-macros"]
 
 [dependencies]
 bytes = "1.0"
-conjure-error = { version = "3.6.0", path = "../conjure-error" }
-conjure-macros = { version = "3.6.0", path = "../conjure-macros", optional = true }
-conjure-object = { version = "3.6.0", path = "../conjure-object" }
-conjure-serde = { version = "3.6.0", path = "../conjure-serde" }
+conjure-error = { version = "4.0.0-rc2", path = "../conjure-error" }
+conjure-macros = { version = "4.0.0-rc2", path = "../conjure-macros", optional = true }
+conjure-object = { version = "4.0.0-rc2", path = "../conjure-object" }
+conjure-serde = { version = "4.0.0-rc2", path = "../conjure-serde" }
 form_urlencoded = "1.0"
 futures-core = "0.3"
 futures-util = "0.3"
diff --git a/conjure-macros/Cargo.toml b/conjure-macros/Cargo.toml
index 70791143..f5033664 100644
--- a/conjure-macros/Cargo.toml
+++ b/conjure-macros/Cargo.toml
@@ -19,8 +19,8 @@ structmeta = "0.3.0"
 syn = { version = "2.0.15", features = ["full"] }
 
 [dev-dependencies]
-conjure-error = { path = "../conjure-error", version = "3.6.0" }
-conjure-http = { path = "../conjure-http", version = "3.6.0", features = [
+conjure-error = { path = "../conjure-error", version = "4.0.0-rc2" }
+conjure-http = { path = "../conjure-http", version = "4.0.0-rc2", features = [
     "macros",
 ] }
-conjure-object = { path = "../conjure-object", version = "3.6.0" }
+conjure-object = { path = "../conjure-object", version = "4.0.0-rc2" }
diff --git a/conjure-rust/Cargo.toml b/conjure-rust/Cargo.toml
index 82f84849..54cc476a 100644
--- a/conjure-rust/Cargo.toml
+++ b/conjure-rust/Cargo.toml
@@ -8,4 +8,4 @@ license = "Apache-2.0"
 [dependencies]
 clap = { version = "4", features = ["derive"] }
 
-conjure-codegen = { version = "3.6.0", path = "../conjure-codegen" }
+conjure-codegen = { version = "4.0.0-rc2", path = "../conjure-codegen" }