diff --git a/CHANGELOG.md b/CHANGELOG.md
index ec69969..53a2d26 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - N/A
 
+## [0.2.1] - 2021-05-01
+
+### Added
+
+- VerifyCanTerminate action
+
+### Changed
+
+- Updated to latest dependencies
+
+### Security
+- A privileged user (such as root) with local access to a server running WhiteBeam can kill the WhiteBeam logging service
+  Fixed in 0.2.1: https://github.com/WhiteBeamSec/WhiteBeam/security/advisories/GHSA-h543-6328-8f64
+
 ## [0.2.0] - 2021-04-20
 
 ### Added
diff --git a/src/application/Cargo.toml b/src/application/Cargo.toml
index a079468..5291626 100644
--- a/src/application/Cargo.toml
+++ b/src/application/Cargo.toml
@@ -1,7 +1,7 @@
 # General info
 [package]
 name = "whitebeam"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["WhiteBeam Security, Inc."]
 edition = "2018"
 
@@ -25,14 +25,14 @@ rpassword = { version = "5.0" }
 cli-table = { version = "0.4" }
 linkme = { version = "0.2" }
 automod = { version = "1.0" }
-rand = { version = "0.7" }
+rand = { version = "0.8" }
 glob = { version = "0.3" }
 goblin = { version = "0.4" }
 # Cryptographic dependencies
 sha3 = { version = "0.9" }
 blake3 = { version = "0.3" }
-argon2 = { version = "0.1" }
-crypto_box = { version = "0.5" }
+argon2 = { version = "0.2" }
+crypto_box = { version = "0.6" }
 
 [features]
 whitelist_test = []
diff --git a/src/application/common/crypto.rs b/src/application/common/crypto.rs
index bf35fa4..4460763 100644
--- a/src/application/common/crypto.rs
+++ b/src/application/common/crypto.rs
@@ -17,7 +17,7 @@ use std::{error::Error,
           path::Path,
           fmt::Write as FmtWrite,
           num::ParseIntError};
-use crypto_box::{ChaChaBox, PublicKey, SecretKey, aead::{Aead, Nonce}, KEY_SIZE};
+use crypto_box::{ChaChaBox, PublicKey, SecretKey, aead::{Aead, generic_array::GenericArray}, KEY_SIZE};
 pub const NONCE_SIZE: usize = 24;
 
 // TODO: Test, probably doesn't work as-is. Especially the ChaChaBox without the postfix tag: https://stackoverflow.com/a/62140062
@@ -135,7 +135,7 @@ fn generate_ciphertext(plaintext: &[u8], nonce: &[u8]) -> Result<Vec<u8>, Box<dy
     let (_client_public_key, client_private_key) = get_client_public_private_key()?;
     let server_public_key = get_server_public_key()?;
     let server_box = ChaChaBox::new(&server_public_key, &client_private_key);
-    let nonce_obj = Nonce::from_slice(nonce);
+    let nonce_obj = GenericArray::from_slice(nonce);
     match server_box.encrypt(&nonce_obj, plaintext) {
         Ok(ciphertext) => Ok(ciphertext),
         Err(_e) => return Err("Could not generate ciphertext".into())
@@ -146,7 +146,7 @@ fn decrypt_server_ciphertext(ciphertext: &[u8], nonce: &[u8]) -> Result<Vec<u8>,
     let (_client_public_key, client_private_key) = get_client_public_private_key()?;
     let server_public_key = get_server_public_key()?;
     let client_box = ChaChaBox::new(&server_public_key, &client_private_key);
-    let nonce_obj = Nonce::from_slice(nonce);
+    let nonce_obj = GenericArray::from_slice(nonce);
     // Verification and decryption
     match client_box.decrypt(&nonce_obj, ciphertext) {
         Ok(plaintext) => Ok(plaintext),
diff --git a/src/application/common/hash/hashes/argon2id.rs b/src/application/common/hash/hashes/argon2id.rs
index d2d4fcc..1de16a6 100644
--- a/src/application/common/hash/hashes/argon2id.rs
+++ b/src/application/common/hash/hashes/argon2id.rs
@@ -8,7 +8,7 @@ build_hash! { ARGON2ID (reader, salt_opt) {
         Some(val) => val,
         None => {
             let mut rng = rand::thread_rng();
-            let mut bytes = [0u8; argon2::password_hash::Salt::recommended_len()];
+            let mut bytes = [0u8; argon2::password_hash::Salt::RECOMMENDED_LENGTH];
             rng.fill_bytes(&mut bytes);
             String::from(argon2::password_hash::SaltString::b64_encode(&bytes).expect("WhiteBeam: Salt string invariant violated").as_str())
         }
@@ -16,5 +16,5 @@ build_hash! { ARGON2ID (reader, salt_opt) {
     // Argon2 with default params (Argon2id v19)
     let argon2 = argon2::Argon2::default();
     // Hash password to PHC string ($argon2id$v=19$...)
-    argon2.hash_password_simple(password.as_bytes(), salt.as_ref()).unwrap().to_string()
+    argon2.hash_password_simple::<String>(password.as_bytes(), &salt).unwrap().to_string()
 }}
diff --git a/src/installer/Cargo.toml b/src/installer/Cargo.toml
index 7a7abc8..04fd62b 100644
--- a/src/installer/Cargo.toml
+++ b/src/installer/Cargo.toml
@@ -1,7 +1,7 @@
 # General info
 [package]
 name = "whitebeam-installer"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["WhiteBeam Security, Inc."]
 edition = "2018"
 
diff --git a/src/library/Cargo.toml b/src/library/Cargo.toml
index 1261ef6..f96ee96 100644
--- a/src/library/Cargo.toml
+++ b/src/library/Cargo.toml
@@ -1,7 +1,7 @@
 # General info
 [package]
 name = "libwhitebeam"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["WhiteBeam Security, Inc."]
 edition = "2018"
 
@@ -23,7 +23,7 @@ glob = { version = "0.3" }
 # Cryptographic dependencies
 sha3 = { version = "0.9" }
 blake3 = { version = "0.3" }
-argon2 = { version = "0.1" }
+argon2 = { version = "0.2" }
 
 [features]
 whitelist_test = []
diff --git a/src/library/common/action/actions/verify_can_terminate.rs b/src/library/common/action/actions/verify_can_terminate.rs
new file mode 100644
index 0000000..8cfa1c7
--- /dev/null
+++ b/src/library/common/action/actions/verify_can_terminate.rs
@@ -0,0 +1,24 @@
+#[macro_use]
+build_action! { VerifyCanTerminate (src_prog, hook, arg_id, args, do_return, return_value) {
+        // Permit termination if not running in prevention mode
+        if !(crate::common::db::get_prevention()) {
+            return (hook, args, do_return, return_value);
+        }
+        // Permit authorized termination
+        if crate::common::db::get_valid_auth_env() {
+            return (hook, args, do_return, return_value);
+        }
+        let pid_index = args.iter().position(|arg| arg.id == arg_id).expect("WhiteBeam: Lost track of environment");
+        let pid: i32 = args[pid_index].clone().real as i32;
+        let service_pid_string: String = std::fs::read_to_string(platform::get_data_file_path_string("whitebeam.pid")).expect("WhiteBeam: Lost track of environment");
+        let service_pid: i32 = service_pid_string.strip_suffix("\n").unwrap_or(&service_pid_string).parse().expect("WhiteBeam: Unexpected null reference");
+        let service_pgid: i32 = unsafe { libc::getpgid(service_pid) };
+        if (pid == service_pid) ||
+           (pid == -service_pgid) ||
+           ((pid == -1) && (platform::get_current_uid() == 0)) {
+            event::send_log_event(event::LogClass::Warn as i64, format!("Blocked {} from killing WhiteBeam service (VerifyCanTerminate)", &src_prog));
+            eprintln!("WhiteBeam: kill ({}): Operation not permitted", pid);
+            do_return = true;
+            return_value = -1;
+        }
+}}
diff --git a/src/library/common/action/actions/verify_can_write.rs b/src/library/common/action/actions/verify_can_write.rs
index 1ef13e5..74535fc 100644
--- a/src/library/common/action/actions/verify_can_write.rs
+++ b/src/library/common/action/actions/verify_can_write.rs
@@ -7,7 +7,7 @@ build_action! { VerifyCanWrite (src_prog, hook, arg_id, args, do_return, return_
         if !(crate::common::db::get_prevention()) {
             return (hook, args, do_return, return_value);
         }
-        // Permit authorized execution
+        // Permit authorized writes
         if crate::common::db::get_valid_auth_env() {
             return (hook, args, do_return, return_value);
         }
diff --git a/src/library/common/convert.rs b/src/library/common/convert.rs
index dec8d8b..fa69ec5 100644
--- a/src/library/common/convert.rs
+++ b/src/library/common/convert.rs
@@ -7,7 +7,7 @@ use std::{ffi::CStr,
           os::unix::ffi::OsStrExt,
           os::unix::ffi::OsStringExt};
 
-// TODO: impl/trait? Extend types? .into()? 0.2.1
+// TODO: impl/trait? Extend types? .into()? 0.2.2
 
 pub unsafe fn c_char_to_osstring(char_ptr: *const c_char) -> OsString {
     match char_ptr.is_null() {
diff --git a/src/library/common/hash/hashes/argon2id.rs b/src/library/common/hash/hashes/argon2id.rs
index 33f5380..241235c 100644
--- a/src/library/common/hash/hashes/argon2id.rs
+++ b/src/library/common/hash/hashes/argon2id.rs
@@ -8,5 +8,5 @@ build_hash! { ARGON2ID (reader, salt_opt) {
     // Argon2 with default params (Argon2id v19)
     let argon2 = argon2::Argon2::default();
     // Hash password to PHC string ($argon2id$v=19$...)
-    argon2.hash_password_simple(password.as_bytes(), salt.as_ref()).unwrap().to_string()
+    argon2.hash_password_simple::<String>(password.as_bytes(), &salt).unwrap().to_string()
 }}
diff --git a/src/library/platforms/linux/mod.rs b/src/library/platforms/linux/mod.rs
index 3329832..c1ab015 100644
--- a/src/library/platforms/linux/mod.rs
+++ b/src/library/platforms/linux/mod.rs
@@ -303,7 +303,7 @@ unsafe extern "C" fn generic_hook (mut arg1: usize, mut args: ...) -> isize {
         // Unsupported
         _ => panic!("WhiteBeam: Unsupported operation"),
     };
-    // TODO: Replace below with post action framework (0.2.1 - 0.2.2)
+    // TODO: Replace below with post action framework (0.2.2 - 0.2.3)
     // TODO: May need fopen/fopen64 => fdopen
     match (hook_orig.symbol.as_ref(), hook.symbol.as_ref()) {
         ("symlink", "symlinkat") => {
@@ -500,13 +500,17 @@ pub unsafe fn dlsym_next_relative(symbol: &str, real_addr: usize) -> *const u8 {
     calculated_addr
 }
 
-pub fn get_data_file_path(data_file: &str) -> PathBuf {
+pub fn get_data_file_path_string(data_file: &str) -> String {
     #[cfg(feature = "whitelist_test")]
     let data_path: String = format!("{}/target/release/examples/", env!("PWD"));
     #[cfg(not(feature = "whitelist_test"))]
     let data_path: String = String::from("/opt/WhiteBeam/data/");
     let data_file_path = data_path + data_file;
-    PathBuf::from(data_file_path)
+    data_file_path
+}
+
+pub fn get_data_file_path(data_file: &str) -> PathBuf {
+    PathBuf::from(get_data_file_path_string(data_file))
 }
 
 pub fn get_rtld_audit_lib_path() -> PathBuf {
diff --git a/src/library/tests/Cargo.toml b/src/library/tests/Cargo.toml
index 07fdb6a..5b4ae21 100644
--- a/src/library/tests/Cargo.toml
+++ b/src/library/tests/Cargo.toml
@@ -1,7 +1,7 @@
 # General info
 [package]
 name = "libwhitebeam-tests"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["WhiteBeam Security, Inc."]
 edition = "2018"