diff --git a/CHANGELOG.md b/CHANGELOG.md
index 15cfc23c..d1c9fac5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@ Version 1.0.0
 
 The official version `1.0`.
 
-Almost the same version as `0.20.3` but with deprecated API removed.
+Almost the same version as `0.20.3` but with deprecated API's removed.
 
 Breaking changes
 ----------------
@@ -18,6 +18,7 @@ Enhancements
 ------------
 
 * New methods `is_odd`, `is_even` for integers, and `is_zero` for all numbers.
+* `From<BTreeSet>` and `From<HashSet>` are added for `Dynamic`, which create object maps with `()` values.
 
 
 Version 0.20.3
diff --git a/src/dynamic.rs b/src/dynamic.rs
index 3ae9aae4..81dde6f6 100644
--- a/src/dynamic.rs
+++ b/src/dynamic.rs
@@ -1977,6 +1977,23 @@ impl<K: Into<crate::Identifier>, T: Variant + Clone> From<std::collections::Hash
     }
 }
 #[cfg(not(feature = "no_object"))]
+#[cfg(not(feature = "no_std"))]
+impl<K: Into<crate::Identifier>> From<std::collections::HashSet<K>> for Dynamic {
+    #[inline(always)]
+    fn from(value: std::collections::HashSet<K>) -> Self {
+        Self(Union::Map(
+            Box::new(
+                value
+                    .into_iter()
+                    .map(|k| (k.into(), Dynamic::UNIT))
+                    .collect(),
+            ),
+            DEFAULT_TAG_VALUE,
+            ReadWrite,
+        ))
+    }
+}
+#[cfg(not(feature = "no_object"))]
 impl<K: Into<crate::Identifier>, T: Variant + Clone> From<std::collections::BTreeMap<K, T>>
     for Dynamic
 {
@@ -1994,6 +2011,22 @@ impl<K: Into<crate::Identifier>, T: Variant + Clone> From<std::collections::BTre
         ))
     }
 }
+#[cfg(not(feature = "no_object"))]
+impl<K: Into<crate::Identifier>> From<std::collections::BTreeSet<K>> for Dynamic {
+    #[inline(always)]
+    fn from(value: std::collections::BTreeSet<K>) -> Self {
+        Self(Union::Map(
+            Box::new(
+                value
+                    .into_iter()
+                    .map(|k| (k.into(), Dynamic::UNIT))
+                    .collect(),
+            ),
+            DEFAULT_TAG_VALUE,
+            ReadWrite,
+        ))
+    }
+}
 impl From<FnPtr> for Dynamic {
     #[inline(always)]
     fn from(value: FnPtr) -> Self {
diff --git a/src/lib.rs b/src/lib.rs
index 905e5655..9bd8e204 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -191,7 +191,7 @@ pub use ast::ScriptFnMetadata;
 #[cfg(not(feature = "no_index"))]
 pub type Array = Vec<Dynamic>;
 
-/// Hash map of [`Dynamic`] values with [`ImmutableString`] keys.
+/// Hash map of [`Dynamic`] values with [`SmartString`](https://crates.io/crates/smartstring) keys.
 /// Not available under `no_object`.
 #[cfg(not(feature = "no_object"))]
 pub type Map = std::collections::BTreeMap<Identifier, Dynamic>;