diff --git a/Cargo.lock b/Cargo.lock
index 0f30998..f0abe4a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -201,6 +201,21 @@ dependencies = [
  "static_assertions",
 ]
 
+[[package]]
+name = "compact_str"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b79c4069c6cad78e2e0cdfcbd26275770669fb39fd308a752dc110e83b9af32"
+dependencies = [
+ "castaway",
+ "cfg-if",
+ "itoa",
+ "rustversion",
+ "ryu",
+ "serde",
+ "static_assertions",
+]
+
 [[package]]
 name = "darling"
 version = "0.20.10"
@@ -313,7 +328,7 @@ name = "garde"
 version = "0.20.0"
 source = "git+https://github.com/jprochazk/garde.git?rev=be00ddddf8de14530ee890ccfdbaf0b13fb32852#be00ddddf8de14530ee890ccfdbaf0b13fb32852"
 dependencies = [
- "compact_str",
+ "compact_str 0.7.1",
  "garde_derive",
  "once_cell",
  "regex",
@@ -357,6 +372,15 @@ version = "0.14.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
 
+[[package]]
+name = "hashbrown"
+version = "0.15.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf151400ff0baff5465007dd2f3e717f3fe502074ca563069ce3a6629d07b289"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"
@@ -380,7 +404,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68b900aa2f7301e21c36462b170ee99994de34dff39a4a6a528e80e7376d07e5"
 dependencies = [
  "equivalent",
- "hashbrown",
+ "hashbrown 0.14.5",
  "serde",
 ]
 
@@ -777,9 +801,11 @@ dependencies = [
  "bigdecimal",
  "bytes",
  "chrono",
+ "compact_str 0.8.1",
  "dyn-clone",
  "either",
  "garde",
+ "hashbrown 0.15.2",
  "indexmap",
  "jsonschema",
  "pretty_assertions",
diff --git a/schemars/Cargo.toml b/schemars/Cargo.toml
index 96232ea..fb33fd1 100644
--- a/schemars/Cargo.toml
+++ b/schemars/Cargo.toml
@@ -20,6 +20,7 @@ dyn-clone = "1.0"
 ref-cast = "1.0.22"
 
 # optional dependencies
+hashbrown015 = { version = "0.15", default-features = false, optional = true, package = "hashbrown" }
 arrayvec07 = { version = "0.7", default-features = false, optional = true, package = "arrayvec" }
 bigdecimal04 = { version = "0.4", default-features = false, optional = true, package = "bigdecimal" }
 bytes1 = { version = "1.0", default-features = false, optional = true, package = "bytes" }
@@ -32,6 +33,7 @@ smallvec1 = { version = "1.0", default-features = false, optional = true, packag
 smol_str02 = { version = "0.2.1", default-features = false, optional = true, package = "smol_str" }
 url2 = { version = "2.0", default-features = false, optional = true, package = "url" }
 uuid1 = { version = "1.0", default-features = false, optional = true, package = "uuid" }
+compact_str08 = { version = "0.8", default-features = false, optional = true, package = "compact_str" }
 
 [dev-dependencies]
 pretty_assertions = "1.2.1"
@@ -45,6 +47,7 @@ garde = { git = "https://github.com/jprochazk/garde.git", rev = "be00ddddf8de145
 validator = { version = "0.18.1", features = ["derive"] }
 regex = { version = "1.10.6", default-features = false }
 
+hashbrown015 = { version = "0.15", default-features = false, features = ["serde"], package = "hashbrown" }
 arrayvec07 = { version = "0.7", default-features = false, features = ["serde"], package = "arrayvec"}
 bigdecimal04 = { version = "0.4", default-features = false, features = ["serde"], package = "bigdecimal" }
 bytes1 = { version = "1.0", default-features = false, features = ["serde"], package = "bytes" }
@@ -55,6 +58,7 @@ rust_decimal1 = { version = "1", default-features = false, features = ["serde"],
 semver1 = { version = "1.0.9", default-features = false, features = ["serde"], package = "semver" }
 smallvec1 = { version = "1.0", default-features = false, features = ["serde"], package = "smallvec" }
 smol_str02 = { version = "0.2.1", default-features = false, features = ["serde"], package = "smol_str" }
+compact_str08 = { version = "0.8", default-features = false, features = ["serde"], package = "compact_str" }
 url2 = { version = "2.0", default-features = false, features = ["serde"], package = "url" }
 uuid1 = { version = "1.0", default-features = false, features = ["serde"], package = "uuid" }
 
diff --git a/schemars/src/json_schema_impls/mod.rs b/schemars/src/json_schema_impls/mod.rs
index cbe1a07..0b5e029 100644
--- a/schemars/src/json_schema_impls/mod.rs
+++ b/schemars/src/json_schema_impls/mod.rs
@@ -83,6 +83,12 @@ forward_impl!((<A: smallvec1::Array> crate::JsonSchema for smallvec1::SmallVec<A
 #[cfg(feature = "smol_str02")]
 forward_impl!(smol_str02::SmolStr => alloc::string::String);
 
+#[cfg(feature = "compact_str08")]
+forward_impl!(compact_str08::CompactString => alloc::string::String);
+
+#[cfg(feature = "hashbrown015")]
+forward_impl!((<K: crate::JsonSchema, V: crate::JsonSchema> crate::JsonSchema for hashbrown015::HashMap<K, V>) => std::collections::HashMap<K, V>);
+
 #[cfg(feature = "url2")]
 mod url2;
 
diff --git a/schemars/tests/integration/compact_str.rs b/schemars/tests/integration/compact_str.rs
new file mode 100644
index 0000000..a40db1e
--- /dev/null
+++ b/schemars/tests/integration/compact_str.rs
@@ -0,0 +1,11 @@
+use compact_str08::CompactString;
+
+use crate::prelude::*;
+
+#[test]
+fn compact_str() {
+    test!(CompactString)
+        .assert_identical::<String>()
+        .assert_allows_ser_roundtrip(["".into(), "test".into()])
+        .assert_matches_de_roundtrip(arbitrary_values());
+}
diff --git a/schemars/tests/integration/main.rs b/schemars/tests/integration/main.rs
index eb44526..0d9da89 100644
--- a/schemars/tests/integration/main.rs
+++ b/schemars/tests/integration/main.rs
@@ -41,6 +41,8 @@ mod skip;
 mod smallvec;
 #[cfg(feature = "smol_str02")]
 mod smol_str;
+#[cfg(feature = "compact_str08")]
+mod compact_str;
 mod std_types;
 mod structs;
 mod transform;