diff --git a/egui/src/any/element.rs b/egui/src/any/element.rs
index 9e41f715..a5af4e8b 100644
--- a/egui/src/any/element.rs
+++ b/egui/src/any/element.rs
@@ -3,8 +3,8 @@ use std::fmt;
 
 /// Like [`std::any::Any`], but also implements `Clone`.
 pub(crate) struct AnyMapElement {
-    value: Box<dyn Any + 'static>,
-    clone_fn: fn(&Box<dyn Any + 'static>) -> Box<dyn Any + 'static>,
+    value: Box<dyn Any + 'static + Send + Sync>,
+    clone_fn: fn(&Box<dyn Any + 'static + Send + Sync>) -> Box<dyn Any + 'static + Send + Sync>,
 }
 
 impl fmt::Debug for AnyMapElement {
@@ -24,9 +24,9 @@ impl Clone for AnyMapElement {
     }
 }
 
-pub trait AnyMapTrait: 'static + Any + Clone {}
+pub trait AnyMapTrait: 'static + Any + Clone + Send + Sync {}
 
-impl<T: 'static + Any + Clone> AnyMapTrait for T {}
+impl<T: 'static + Any + Clone + Send + Sync> AnyMapTrait for T {}
 
 impl AnyMapElement {
     pub(crate) fn new<T: AnyMapTrait>(t: T) -> Self {
diff --git a/egui/src/any/serializable/element.rs b/egui/src/any/serializable/element.rs
index eb980c25..ef64c5bb 100644
--- a/egui/src/any/serializable/element.rs
+++ b/egui/src/any/serializable/element.rs
@@ -8,10 +8,10 @@ pub(crate) struct AnyMapElement(AnyMapElementInner);
 
 enum AnyMapElementInner {
     Deserialized {
-        value: Box<dyn Any + 'static>,
-        clone_fn: fn(&Box<dyn Any + 'static>) -> Box<dyn Any + 'static>,
+        value: Box<dyn Any + 'static + Send + Sync>,
+        clone_fn: fn(&Box<dyn Any + 'static + Send + Sync>) -> Box<dyn Any + 'static + Send + Sync>,
 
-        serialize_fn: fn(&Box<dyn Any + 'static>) -> Result<String, ron::Error>,
+        serialize_fn: fn(&Box<dyn Any + 'static + Send + Sync>) -> Result<String, ron::Error>,
     },
     Serialized(String, TypeId),
 }
@@ -84,8 +84,14 @@ impl Clone for AnyMapElement {
     }
 }
 
-pub trait AnyMapTrait: 'static + Any + Clone + Serialize + for<'a> Deserialize<'a> {}
-impl<T: 'static + Any + Clone + Serialize + for<'a> Deserialize<'a>> AnyMapTrait for T {}
+pub trait AnyMapTrait:
+    'static + Any + Clone + Serialize + for<'a> Deserialize<'a> + Send + Sync
+{
+}
+impl<T: 'static + Any + Clone + Serialize + for<'a> Deserialize<'a> + Send + Sync> AnyMapTrait
+    for T
+{
+}
 
 impl AnyMapElement {
     pub(crate) fn new<T: AnyMapTrait>(t: T) -> Self {
diff --git a/egui/src/memory.rs b/egui/src/memory.rs
index 608b0b0f..a0b9590f 100644
--- a/egui/src/memory.rs
+++ b/egui/src/memory.rs
@@ -500,3 +500,12 @@ impl Areas {
         wants_to_be_on_top.clear();
     }
 }
+
+// ----------------------------------------------------------------------------
+
+#[cfg(test)]
+#[test]
+fn memory_impl_send_sync() {
+    fn assert_send_sync<T: Send + Sync>() {}
+    assert_send_sync::<Memory>();
+}