diff --git a/schemars/Cargo.toml b/schemars/Cargo.toml
index de804386..8470a24f 100644
--- a/schemars/Cargo.toml
+++ b/schemars/Cargo.toml
@@ -21,6 +21,7 @@ dyn-clone = "1.0"
 
 chrono = { version = "0.4", default-features = false, optional = true }
 indexmap = { version = "1.2", features = ["serde-1"], optional = true }
+indexmap2 = { version = "2.0", features = ["serde"], optional = true, package = "indexmap" }
 either = { version = "1.3", default-features = false, optional = true }
 uuid08 = { version = "0.8", default-features = false, optional = true, package = "uuid" }
 uuid1 = { version = "1.0", default-features = false, optional = true, package = "uuid" }
@@ -69,6 +70,10 @@ required-features = ["chrono"]
 name = "indexmap"
 required-features = ["indexmap"]
 
+[[test]]
+name = "indexmap2"
+required-features = ["indexmap2"]
+
 [[test]]
 name = "either"
 required-features = ["either"]
diff --git a/schemars/src/json_schema_impls/indexmap2.rs b/schemars/src/json_schema_impls/indexmap2.rs
new file mode 100644
index 00000000..44eeedb3
--- /dev/null
+++ b/schemars/src/json_schema_impls/indexmap2.rs
@@ -0,0 +1,8 @@
+use crate::gen::SchemaGenerator;
+use crate::schema::*;
+use crate::JsonSchema;
+use indexmap2::{IndexMap, IndexSet};
+use std::collections::{HashMap, HashSet};
+
+forward_impl!((<K, V: JsonSchema, H> JsonSchema for IndexMap<K, V, H>) => HashMap<K, V, H>);
+forward_impl!((<T: JsonSchema, H> JsonSchema for IndexSet<T, H>) => HashSet<T, H>);
diff --git a/schemars/src/json_schema_impls/mod.rs b/schemars/src/json_schema_impls/mod.rs
index d96bf382..22d1c46b 100644
--- a/schemars/src/json_schema_impls/mod.rs
+++ b/schemars/src/json_schema_impls/mod.rs
@@ -56,6 +56,8 @@ mod enumset;
 mod ffi;
 #[cfg(feature = "indexmap")]
 mod indexmap;
+#[cfg(feature = "indexmap2")]
+mod indexmap2;
 mod maps;
 mod nonzero_signed;
 mod nonzero_unsigned;
diff --git a/schemars/tests/indexmap2.rs b/schemars/tests/indexmap2.rs
new file mode 100644
index 00000000..efc77ddf
--- /dev/null
+++ b/schemars/tests/indexmap2.rs
@@ -0,0 +1,16 @@
+mod util;
+use indexmap2::{IndexMap, IndexSet};
+use schemars::JsonSchema;
+use util::*;
+
+#[allow(dead_code)]
+#[derive(JsonSchema)]
+struct IndexMapTypes {
+    map: IndexMap<i32, bool>,
+    set: IndexSet<isize>,
+}
+
+#[test]
+fn indexmap_types() -> TestResult {
+    test_default_generated_schema::<IndexMapTypes>("indexmap")
+}