diff --git a/satrs-core/Cargo.toml b/satrs-core/Cargo.toml
index f4fcde8..3c5606a 100644
--- a/satrs-core/Cargo.toml
+++ b/satrs-core/Cargo.toml
@@ -7,11 +7,14 @@ edition = "2021"
 
 [dependencies]
 delegate = "0.8"
-hashbrown = "0.13"
 paste = "1.0"
 dyn-clone = "1.0"
 embed-doc-image = "0.1"
 
+[dependencies.hashbrown]
+version = "0.13"
+optional = true
+
 [dependencies.heapless]
 version = "0.7"
 optional = true
@@ -55,7 +58,7 @@ version = "1.0"
 [features]
 default = ["std"]
 std = ["downcast-rs/std", "alloc", "bus", "postcard/use-std", "crossbeam-channel/std", "serde/std", "spacepackets/std"]
-alloc = ["serde/alloc", "spacepackets/alloc"]
+alloc = ["serde/alloc", "spacepackets/alloc", "hashbrown"]
 serde = ["dep:serde", "spacepackets/serde"]
 crossbeam = ["crossbeam-channel"]
 heapless = ["dep:heapless"]
diff --git a/satrs-core/src/event_man.rs b/satrs-core/src/event_man.rs
index 794ce28..5d2db19 100644
--- a/satrs-core/src/event_man.rs
+++ b/satrs-core/src/event_man.rs
@@ -63,6 +63,7 @@ use alloc::vec;
 #[cfg(feature = "alloc")]
 use alloc::vec::Vec;
 use core::slice::Iter;
+#[cfg(feature = "alloc")]
 use hashbrown::HashMap;
 
 #[cfg(feature = "std")]
diff --git a/satrs-core/src/pus/event_man.rs b/satrs-core/src/pus/event_man.rs
index 380cbc8..611add8 100644
--- a/satrs-core/src/pus/event_man.rs
+++ b/satrs-core/src/pus/event_man.rs
@@ -3,7 +3,9 @@ use crate::events::{EventU32, GenericEvent, Severity};
 use crate::events::{EventU32TypedSev, HasSeverity};
 #[cfg(feature = "alloc")]
 use alloc::boxed::Box;
+#[cfg(feature = "alloc")]
 use core::hash::Hash;
+#[cfg(feature = "alloc")]
 use hashbrown::HashSet;
 
 #[cfg(feature = "alloc")]
@@ -38,43 +40,6 @@ pub trait PusEventMgmtBackendProvider<Provider: GenericEvent> {
     fn disable_event_reporting(&mut self, event: &Provider) -> Result<bool, Self::Error>;
 }
 
-/// Default backend provider which uses a hash set as the event reporting status container
-/// like mentioned in the example of the [PusEventMgmtBackendProvider] documentation.
-///
-/// This provider is a good option for host systems or larger embedded systems where
-/// the expected occasional memory allocation performed by the [HashSet] is not an issue.
-pub struct DefaultPusMgmtBackendProvider<Event: GenericEvent = EventU32> {
-    disabled: HashSet<Event>,
-}
-
-/// Safety: All contained field are [Send] as well
-unsafe impl<Event: GenericEvent + Send> Send for DefaultPusMgmtBackendProvider<Event> {}
-
-impl<Event: GenericEvent> Default for DefaultPusMgmtBackendProvider<Event> {
-    fn default() -> Self {
-        Self {
-            disabled: HashSet::default(),
-        }
-    }
-}
-
-impl<Provider: GenericEvent + PartialEq + Eq + Hash + Copy + Clone>
-    PusEventMgmtBackendProvider<Provider> for DefaultPusMgmtBackendProvider<Provider>
-{
-    type Error = ();
-    fn event_enabled(&self, event: &Provider) -> bool {
-        !self.disabled.contains(event)
-    }
-
-    fn enable_event_reporting(&mut self, event: &Provider) -> Result<bool, Self::Error> {
-        Ok(self.disabled.remove(event))
-    }
-
-    fn disable_event_reporting(&mut self, event: &Provider) -> Result<bool, Self::Error> {
-        Ok(self.disabled.insert(*event))
-    }
-}
-
 #[cfg(feature = "heapless")]
 pub mod heapless_mod {
     use super::*;
@@ -145,6 +110,43 @@ impl<SenderE> From<EcssTmError<SenderE>> for EventManError<SenderE> {
 pub mod alloc_mod {
     use super::*;
 
+    /// Default backend provider which uses a hash set as the event reporting status container
+    /// like mentioned in the example of the [PusEventMgmtBackendProvider] documentation.
+    ///
+    /// This provider is a good option for host systems or larger embedded systems where
+    /// the expected occasional memory allocation performed by the [HashSet] is not an issue.
+    pub struct DefaultPusMgmtBackendProvider<Event: GenericEvent = EventU32> {
+        disabled: HashSet<Event>,
+    }
+
+    /// Safety: All contained field are [Send] as well
+    unsafe impl<Event: GenericEvent + Send> Send for DefaultPusMgmtBackendProvider<Event> {}
+
+    impl<Event: GenericEvent> Default for DefaultPusMgmtBackendProvider<Event> {
+        fn default() -> Self {
+            Self {
+                disabled: HashSet::default(),
+            }
+        }
+    }
+
+    impl<Provider: GenericEvent + PartialEq + Eq + Hash + Copy + Clone>
+        PusEventMgmtBackendProvider<Provider> for DefaultPusMgmtBackendProvider<Provider>
+    {
+        type Error = ();
+        fn event_enabled(&self, event: &Provider) -> bool {
+            !self.disabled.contains(event)
+        }
+
+        fn enable_event_reporting(&mut self, event: &Provider) -> Result<bool, Self::Error> {
+            Ok(self.disabled.remove(event))
+        }
+
+        fn disable_event_reporting(&mut self, event: &Provider) -> Result<bool, Self::Error> {
+            Ok(self.disabled.insert(*event))
+        }
+    }
+
     pub struct PusEventDispatcher<BackendError, Provider: GenericEvent> {
         reporter: EventReporter,
         backend: Box<dyn PusEventMgmtBackendProvider<Provider, Error = BackendError>>,
diff --git a/satrs-core/src/pus/verification.rs b/satrs-core/src/pus/verification.rs
index 1f6c6da..0e54fdf 100644
--- a/satrs-core/src/pus/verification.rs
+++ b/satrs-core/src/pus/verification.rs
@@ -95,7 +95,7 @@ pub use alloc_mod::{
 };
 
 use crate::seq_count::SequenceCountProvider;
-#[cfg(feature = "crossbeam")]
+#[cfg(all(feature = "crossbeam", feature = "std"))]
 pub use stdmod::CrossbeamVerifSender;
 #[cfg(feature = "std")]
 pub use stdmod::{
diff --git a/satrs-core/tests/pus_verification.rs b/satrs-core/tests/pus_verification.rs
index dac580a..66f414e 100644
--- a/satrs-core/tests/pus_verification.rs
+++ b/satrs-core/tests/pus_verification.rs
@@ -1,3 +1,4 @@
+// TODO: Refactor this to also test the STD impl using mpsc
 #[cfg(feature = "crossbeam")]
 pub mod crossbeam_test {
     use hashbrown::HashMap;