diff --git a/CHANGELOG.md b/CHANGELOG.md
index b6d5bc5..97202b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 # [unreleased]
 
+- Bumped `thiserror` to v2
+- Bumped `spacepackets` to v0.13
+- The source and destination handlers can now be used without the `std` feature and only require
+  the `alloc` feature.
+
 # [v0.1.0] 2024-09-11
 
 Initial release
diff --git a/Cargo.toml b/Cargo.toml
index 8225fa2..6cb2745 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,18 +18,19 @@ name = "cfdp"
 [dependencies]
 crc = "3"
 smallvec = "1"
-derive-new = "0.6"
+derive-new = ">=0.6, <=0.7"
 
 [dependencies.spacepackets]
-version = "0.12"
+version = "0.13"
 default-features = false
+path = "../spacepackets"
 
 [dependencies.thiserror]
-version = "1"
-optional = true
+version = "2"
+default-features = false
 
 [dependencies.hashbrown]
-version = "0.14"
+version = ">=0.14, <=0.15"
 optional = true
 
 [dependencies.serde]
@@ -44,7 +45,7 @@ optional = true
 default = ["std"]
 std = [
     "alloc",
-    "thiserror",
+    "thiserror/std",
     "spacepackets/std"
 ]
 alloc = [
@@ -58,7 +59,7 @@ defmt = ["dep:defmt", "spacepackets/defmt"]
 tempfile = "3"
 rand = "0.8"
 log = "0.4"
-fern = "0.6"
+fern = "0.7"
 chrono = "0.4"
 clap = { version = "4", features = ["derive"] }
 
diff --git a/README.md b/README.md
index 0479568..4c4855a 100644
--- a/README.md
+++ b/README.md
@@ -14,14 +14,13 @@ The underlying base packet library used to generate the packets to be sent is th
 # Features
 
 The goal of this library is to be flexible enough to support the use-cases of both on-board
-software and of ground software. It has support to make integration on [std] systems as simple
-as possible, but also has sufficient abstraction to allow for integration on`no_std` environments.
-Currently, the handlers still require the [std] feature until
-[thiserror supports `error_in_core`](https://github.com/dtolnay/thiserror/pull/304).
+software and of ground software. It has support to make integration on `std` systems as simple
+as possible, but also has sufficient abstraction to allow for integration on`no_std` environments
+and can be used on these systems as well as long as the `alloc` feature is activated.
 
-It is recommended to activate the `alloc` feature at the very least to allow using the primary
-components provided by this crate. These components will only allocate memory at initialization
-time and thus are still viable for systems where run-time allocation is prohibited.
+Please note even though the `alloc` feature is required for the core handlers, these components
+will only allocate memory at initialization time and thus are still viable for systems where
+run-time allocation is prohibited.
 
 ## Default features
 
diff --git a/src/dest.rs b/src/dest.rs
index 8b7d48e..0b6c31c 100644
--- a/src/dest.rs
+++ b/src/dest.rs
@@ -55,7 +55,6 @@ use spacepackets::{
     },
     util::{UnsignedByteField, UnsignedEnum},
 };
-use thiserror::Error;
 
 #[derive(Debug)]
 struct FileProperties {
@@ -189,7 +188,7 @@ impl<CheckTimer: CountdownProvider> TransactionParams<CheckTimer> {
     }
 }
 
-#[derive(Debug, Error)]
+#[derive(Debug, thiserror::Error)]
 pub enum DestError {
     /// File directive expected, but none specified
     #[error("expected file directive")]
@@ -215,6 +214,7 @@ pub enum DestError {
     #[error("pdu error {0}")]
     Pdu(#[from] PduError),
     #[error("io error {0}")]
+    #[cfg(feature = "std")]
     Io(#[from] std::io::Error),
     #[error("file store error {0}")]
     Filestore(#[from] FilestoreError),
diff --git a/src/filestore.rs b/src/filestore.rs
index 9af7022..7709c9c 100644
--- a/src/filestore.rs
+++ b/src/filestore.rs
@@ -1,103 +1,38 @@
-use alloc::string::{String, ToString};
-use core::fmt::Display;
 use spacepackets::cfdp::ChecksumType;
 use spacepackets::ByteConversionError;
 #[cfg(feature = "std")]
-use std::error::Error;
-use std::path::Path;
-#[cfg(feature = "std")]
 pub use std_mod::*;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, thiserror::Error)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[non_exhaustive]
 pub enum FilestoreError {
+    #[error("file does not exist")]
     FileDoesNotExist,
+    #[error("file already exists")]
     FileAlreadyExists,
+    #[error("directory does not exist")]
     DirDoesNotExist,
+    #[error("permission error")]
     Permission,
+    #[error("is not a file")]
     IsNotFile,
+    #[error("is not a directory")]
     IsNotDirectory,
-    ByteConversion(ByteConversionError),
-    Io {
-        raw_errno: Option<i32>,
-        string: String,
-    },
+    #[error("byte conversion: {0}")]
+    ByteConversion(#[from] ByteConversionError),
+    #[error("IO error: {0})")]
+    #[cfg(feature = "std")]
+    Io(#[from] std::io::Error),
+    #[error("checksum type not implemented: {0:?}")]
     ChecksumTypeNotImplemented(ChecksumType),
+    #[error("utf8 error")]
     Utf8Error,
+    #[error("other error")]
     Other,
 }
 
-impl From<ByteConversionError> for FilestoreError {
-    fn from(value: ByteConversionError) -> Self {
-        Self::ByteConversion(value)
-    }
-}
-
-impl Display for FilestoreError {
-    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        match self {
-            FilestoreError::FileDoesNotExist => {
-                write!(f, "file does not exist")
-            }
-            FilestoreError::FileAlreadyExists => {
-                write!(f, "file already exists")
-            }
-            FilestoreError::DirDoesNotExist => {
-                write!(f, "directory does not exist")
-            }
-            FilestoreError::Permission => {
-                write!(f, "permission error")
-            }
-            FilestoreError::IsNotFile => {
-                write!(f, "is not a file")
-            }
-            FilestoreError::IsNotDirectory => {
-                write!(f, "is not a directory")
-            }
-            FilestoreError::ByteConversion(e) => {
-                write!(f, "filestore error: {e}")
-            }
-            FilestoreError::Io { raw_errno, string } => {
-                write!(
-                    f,
-                    "filestore generic IO error with raw errno {:?}: {}",
-                    raw_errno, string
-                )
-            }
-            FilestoreError::ChecksumTypeNotImplemented(checksum_type) => {
-                write!(f, "checksum {:?} not implemented", checksum_type)
-            }
-            FilestoreError::Utf8Error => {
-                write!(f, "utf8 error")
-            }
-            FilestoreError::Other => {
-                write!(f, "some filestore error occured")
-            }
-        }
-    }
-}
-
-impl Error for FilestoreError {
-    fn source(&self) -> Option<&(dyn Error + 'static)> {
-        match self {
-            FilestoreError::ByteConversion(e) => Some(e),
-            _ => None,
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-impl From<std::io::Error> for FilestoreError {
-    fn from(value: std::io::Error) -> Self {
-        Self::Io {
-            raw_errno: value.raw_os_error(),
-            string: value.to_string(),
-        }
-    }
-}
-
 pub trait VirtualFilestore {
     fn create_file(&self, file_path: &str) -> Result<(), FilestoreError>;
 
@@ -122,14 +57,7 @@ pub trait VirtualFilestore {
 
     fn filename_from_full_path(path: &str) -> Option<&str>
     where
-        Self: Sized,
-    {
-        // Convert the path string to a Path
-        let path = Path::new(path);
-
-        // Extract the file name using the file_name() method
-        path.file_name().and_then(|name| name.to_str())
-    }
+        Self: Sized;
 
     fn is_file(&self, path: &str) -> Result<bool, FilestoreError>;
 
@@ -193,7 +121,7 @@ pub mod std_mod {
     use super::*;
     use std::{
         fs::{self, File, OpenOptions},
-        io::{BufReader, Read, Seek, SeekFrom, Write},
+        io::{BufReader, Read, Seek, SeekFrom, Write}, path::Path,
     };
 
     #[derive(Default)]
@@ -241,10 +169,7 @@ pub mod std_mod {
         }
 
         fn create_dir(&self, dir_path: &str) -> Result<(), FilestoreError> {
-            fs::create_dir(dir_path).map_err(|e| FilestoreError::Io {
-                raw_errno: e.raw_os_error(),
-                string: e.to_string(),
-            })?;
+            fs::create_dir(dir_path)?;
             Ok(())
         }
 
@@ -358,6 +283,17 @@ pub mod std_mod {
                 _ => Err(FilestoreError::ChecksumTypeNotImplemented(checksum_type)),
             }
         }
+
+        fn filename_from_full_path(path: &str) -> Option<&str>
+        where
+            Self: Sized,
+        {
+            // Convert the path string to a Path
+            let path = Path::new(path);
+
+            // Extract the file name using the file_name() method
+            path.file_name().and_then(|name| name.to_str())
+        }
     }
 
     impl NativeFilestore {
@@ -393,7 +329,7 @@ pub mod std_mod {
 
 #[cfg(test)]
 mod tests {
-    use std::{fs, path::Path, println};
+    use std::{fs, path::Path, println, string::ToString};
 
     use super::*;
     use alloc::format;
diff --git a/src/lib.rs b/src/lib.rs
index b9bd698..d475b57 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,11 +14,12 @@
 //! The goal of this library is to be flexible enough to support the use-cases of both on-board
 //! software and of ground software. It has support to make integration on [std] systems as simple
 //! as possible, but also has sufficient abstraction to allow for integration on `no_std`
-//! environments. Currently, the handlers still require the [std] feature until
-//! [thiserror supports `error_in_core`](https://github.com/dtolnay/thiserror/pull/304).
-//! It is recommended to activate the `alloc` feature at the very least to allow using the primary
-//! components provided by this crate. These components will only allocate memory at initialization
-//! time and thus are still viable for systems where run-time allocation is prohibited.
+//! environments and can be used on these systems as well as long as the [alloc] feature is used
+//! as well.
+//!
+//! Please note even though the [alloc] feature is required for the core handlers, these components
+//! will only allocate memory at initialization time and thus are still viable for systems where
+//! run-time allocation is prohibited.
 //!
 //! The core of this library are the [crate::dest::DestinationHandler] and the
 //! [crate::source::SourceHandler] components which model the CFDP destination and source entity
@@ -70,12 +71,11 @@ extern crate alloc;
 #[cfg(any(feature = "std", test))]
 extern crate std;
 
-#[cfg(feature = "std")]
-pub mod dest;
 #[cfg(feature = "alloc")]
+pub mod dest;
 pub mod filestore;
 pub mod request;
-#[cfg(feature = "std")]
+#[cfg(feature = "alloc")]
 pub mod source;
 pub mod time;
 pub mod user;
@@ -83,8 +83,6 @@ pub mod user;
 use crate::time::CountdownProvider;
 use core::{cell::RefCell, fmt::Debug, hash::Hash};
 use crc::{Crc, CRC_32_ISCSI, CRC_32_ISO_HDLC};
-#[cfg(feature = "std")]
-use hashbrown::HashMap;
 
 #[cfg(feature = "alloc")]
 pub use alloc_mod::*;
@@ -288,12 +286,12 @@ pub trait RemoteEntityConfigProvider {
     fn remove_config(&mut self, remote_id: u64) -> bool;
 }
 
-/// This is a thin wrapper around a [HashMap] to store remote entity configurations.
+/// This is a thin wrapper around a [hashbrown::HashMap] to store remote entity configurations.
 /// It implements the full [RemoteEntityConfigProvider] trait.
-#[cfg(feature = "std")]
+#[cfg(feature = "alloc")]
 #[derive(Default, Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct StdRemoteEntityConfigProvider(pub HashMap<u64, RemoteEntityConfig>);
+pub struct StdRemoteEntityConfigProvider(pub hashbrown::HashMap<u64, RemoteEntityConfig>);
 
 #[cfg(feature = "std")]
 impl RemoteEntityConfigProvider for StdRemoteEntityConfigProvider {
@@ -879,7 +877,7 @@ impl<'raw> PduRawWithInfo<'raw> {
             });
         }
         if pdu_header.pdu_datafield_len() < 1 {
-            return Err(PduError::FormatError);
+            return Err(PduError::Format);
         }
         // Route depending on PDU type and directive type if applicable. Retrieve directive type
         // from the raw stream for better performance (with sanity and directive code check).
@@ -1548,7 +1546,7 @@ pub(crate) mod tests {
 
     #[test]
     fn transaction_id_hashable_usable_as_map_key() {
-        let mut map = HashMap::new();
+        let mut map = hashbrown::HashMap::new();
         let transaction_id_0 = TransactionId::new(
             UnsignedByteFieldU8::new(1).into(),
             UnsignedByteFieldU8::new(2).into(),
diff --git a/src/source.rs b/src/source.rs
index fbd1299..dbced99 100644
--- a/src/source.rs
+++ b/src/source.rs
@@ -748,25 +748,6 @@ impl<
     }
 
     fn notice_of_completion(&mut self, cfdp_user: &mut impl CfdpUser) {
-        /*
-        def _notice_of_completion(self):
-            if self.cfg.indication_cfg.transaction_finished_indication_required:
-                assert self._params.transaction_id is not None
-                # This happens for unacknowledged file copy operation with no closure.
-                if self._params.finished_params is None:
-                    self._params.finished_params = FinishedParams(
-                        condition_code=ConditionCode.NO_ERROR,
-                        delivery_code=DeliveryCode.DATA_COMPLETE,
-                        file_status=FileStatus.FILE_STATUS_UNREPORTED,
-                    )
-                indication_params = TransactionFinishedParams(
-                    transaction_id=self._params.transaction_id,
-                    finished_params=self._params.finished_params,
-                )
-                self.user.transaction_finished_indication(indication_params)
-            # Transaction finished
-            self.reset()
-                */
         let tstate = self.tstate.as_ref().unwrap();
         if self.local_cfg.indication_cfg.transaction_finished {
             // The first case happens for unacknowledged file copy operation with no closure.