diff --git a/Cargo.toml b/Cargo.toml
index f71655529..f9ca6c23c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,20 +18,20 @@ include = ["src/**/*", "LICENSE", "crates-io.md"]
 
 [features]
 chrono = ["chrono04"]
-indexmap = ["indexmap2"]
+indexmap = ["indexmap1"]
 linked-hash-map = ["linked-hash-map05"]
 time = ["time03"]
 uuid = ["uuid08", "uuid1"]
 
 [dependencies]
-indexmap = "1.7"
+indexmap = "2.0"
 openapi_type_derive = { path = "./derive", version = "0.4.4" }
-openapiv3 = "=1.0.2"
+openapiv3 = "=2.0.0"
 serde_json = "1.0"
 
 # optional dependencies / features
 chrono04 = { package = "chrono", version = "0.4", default-features = false, optional = true }
-indexmap2 = { package = "indexmap", version = "2.0", optional = true }
+indexmap1 = { package = "indexmap", version = "1.0", optional = true }
 linked-hash-map05 = { package = "linked-hash-map", version = "0.5", optional = true }
 time03 = { package = "time", version = "0.3", features = ["serde-human-readable"], optional = true }
 uuid08 = { package = "uuid", version = "0.8", optional = true }
diff --git a/src/impls.rs b/src/impls.rs
index 45574f387..b33a78528 100644
--- a/src/impls.rs
+++ b/src/impls.rs
@@ -251,9 +251,9 @@ map! {
 	IndexMap<K, V, S>(V);
 }
 
-#[cfg(feature = "indexmap2")]
+#[cfg(feature = "indexmap1")]
 map! {
-	indexmap2::IndexMap<K, V, S>(V);
+	indexmap1::IndexMap<K, V, S>(V);
 }
 
 #[cfg(feature = "linked-hash-map05")]
diff --git a/src/visitor/openapi.rs b/src/visitor/openapi.rs
index 9ff462df4..203f7d353 100644
--- a/src/visitor/openapi.rs
+++ b/src/visitor/openapi.rs
@@ -1,8 +1,8 @@
 use super::{never::Never, seal, AlternativesVisitor, ObjectVisitor, Visitor};
 use indexmap::{map::Entry, IndexMap};
 use openapiv3::{
-	AdditionalProperties, ArrayType, IntegerFormat, IntegerType, NumberFormat, NumberType, ObjectType, ReferenceOr, Schema,
-	SchemaData, SchemaKind, StringFormat, StringType, Type, VariantOrUnknownOrEmpty
+	AdditionalProperties, ArrayType, BooleanType, IntegerFormat, IntegerType, NumberFormat, NumberType, ObjectType,
+	ReferenceOr, Schema, SchemaData, SchemaKind, StringFormat, StringType, Type, VariantOrUnknownOrEmpty
 };
 use std::fmt::Display;
 
@@ -140,7 +140,7 @@ impl OpenapiVisitor {
 
 			Self::Bool => Some(OpenapiSchema::new(Schema {
 				schema_data: Default::default(),
-				schema_kind: SchemaKind::Type(Type::Boolean {})
+				schema_kind: SchemaKind::Type(Type::Boolean(BooleanType::default()))
 			})),
 
 			Self::Int { byte, minimum } => Some(OpenapiSchema::new(Schema {