diff --git a/Cargo.toml b/Cargo.toml
index bcd6119e1..95d0e22a6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,6 @@ displaydoc = { version = "0.2.4", default-features = false }
 flate2 = { version = "1.0.28", default-features = false, optional = true }
 indexmap = "2"
 hmac = { version = "0.12.1", optional = true, features = ["reset"] }
-num_enum = "0.7.2"
 pbkdf2 = { version = "0.12.2", optional = true }
 rand = { version = "0.8.5", optional = true }
 sha1 = { version = "0.10.6", optional = true }
diff --git a/src/types.rs b/src/types.rs
index bba8241a7..00a851da1 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -1,5 +1,4 @@
 //! Types that specify what is contained in a ZIP.
-use num_enum::{FromPrimitive, IntoPrimitive};
 use path::{Component, Path, PathBuf};
 use std::path;
 use std::sync::{Arc, OnceLock};
@@ -21,15 +20,34 @@ use crate::CompressionMethod;
 #[cfg(feature = "time")]
 use time::{error::ComponentRange, Date, Month, OffsetDateTime, PrimitiveDateTime, Time};
 
-#[derive(Clone, Copy, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 #[repr(u8)]
 pub enum System {
     Dos = 0,
     Unix = 3,
-    #[num_enum(default)]
     Unknown,
 }
 
+impl From<u8> for System {
+    fn from(system: u8) -> Self {
+        match system {
+            0 => Self::Dos,
+            3 => Self::Unix,
+            _ => Self::Unknown,
+        }
+    }
+}
+
+impl From<System> for u8 {
+    fn from(system: System) -> Self {
+        match system {
+            System::Dos => 0,
+            System::Unix => 3,
+            System::Unknown => 4,
+        }
+    }
+}
+
 /// Representation of a moment in time.
 ///
 /// Zip files use an old format from DOS to store timestamps,