diff --git a/Cargo.lock b/Cargo.lock
index 6ac8254..65a4696 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -700,7 +700,7 @@ checksum = "e8566979429cf69b49a5c740c60791108e86440e8be149bbea4fe54d2c32d6e2"
 
 [[package]]
 name = "db-pool"
-version = "0.3.2"
+version = "0.4.0"
 dependencies = [
  "async-graphql",
  "async-graphql-poem",
diff --git a/Cargo.toml b/Cargo.toml
index 2acc27f..9da866a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "db-pool"
-version = "0.3.2"
+version = "0.4.0"
 edition = "2021"
 description = "A thread-safe database pool for running database-tied integration tests in parallel"
 license = "MIT"
diff --git a/book/Cargo.lock b/book/Cargo.lock
index cc2a7e1..f08a36e 100644
--- a/book/Cargo.lock
+++ b/book/Cargo.lock
@@ -155,7 +155,7 @@ dependencies = [
 
 [[package]]
 name = "book"
-version = "0.3.2"
+version = "0.4.0"
 dependencies = [
  "bb8",
  "bb8-postgres",
@@ -362,7 +362,7 @@ dependencies = [
 
 [[package]]
 name = "db-pool"
-version = "0.3.2"
+version = "0.4.0"
 dependencies = [
  "async-trait",
  "bb8",
diff --git a/book/Cargo.toml b/book/Cargo.toml
index b16c194..3b429a2 100644
--- a/book/Cargo.toml
+++ b/book/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "book"
-version = "0.3.2"
+version = "0.4.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html