diff --git a/fuzzers/frida_libpng/Cargo.toml b/fuzzers/frida_libpng/Cargo.toml
index 6e07c286b0..a8c97f87ea 100644
--- a/fuzzers/frida_libpng/Cargo.toml
+++ b/fuzzers/frida_libpng/Cargo.toml
@@ -16,7 +16,6 @@ debug = true
 
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
-num_cpus = "1.0"
 which = "4.1"
 xz = "0.1.0"
 flate2 = "1.0.22"
diff --git a/fuzzers/fuzzbench/Cargo.toml b/fuzzers/fuzzbench/Cargo.toml
index f9c4786331..2f04bcecbc 100644
--- a/fuzzers/fuzzbench/Cargo.toml
+++ b/fuzzers/fuzzbench/Cargo.toml
@@ -17,7 +17,6 @@ debug = true
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
 which = { version = "4.0.2" }
-num_cpus = "1.0"
 
 [dependencies]
 libafl = { path = "../../libafl/" }
diff --git a/fuzzers/fuzzbench_text/Cargo.toml b/fuzzers/fuzzbench_text/Cargo.toml
index 34016661a3..be001046be 100644
--- a/fuzzers/fuzzbench_text/Cargo.toml
+++ b/fuzzers/fuzzbench_text/Cargo.toml
@@ -17,7 +17,6 @@ debug = true
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
 which = { version = "4.0.2" }
-num_cpus = "1.0"
 
 [dependencies]
 libafl = { path = "../../libafl/" }
diff --git a/fuzzers/fuzzbench_weighted/Cargo.toml b/fuzzers/fuzzbench_weighted/Cargo.toml
index 8032eb4cd8..369aefd31e 100644
--- a/fuzzers/fuzzbench_weighted/Cargo.toml
+++ b/fuzzers/fuzzbench_weighted/Cargo.toml
@@ -17,7 +17,6 @@ debug = true
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
 which = { version = "4.0.2" }
-num_cpus = "1.0"
 
 [dependencies]
 libafl = { path = "../../libafl/" }
diff --git a/fuzzers/libafl_atheris/Cargo.toml b/fuzzers/libafl_atheris/Cargo.toml
index 305da0712a..1d6aad2e4c 100644
--- a/fuzzers/libafl_atheris/Cargo.toml
+++ b/fuzzers/libafl_atheris/Cargo.toml
@@ -17,7 +17,6 @@ debug = true
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
 which = { version = "4.0.2" }
-num_cpus = "1.0"
 
 [dependencies]
 libafl = { path = "../../libafl/" }
diff --git a/fuzzers/libfuzzer_libmozjpeg/Cargo.toml b/fuzzers/libfuzzer_libmozjpeg/Cargo.toml
index 5f88f746e7..5f33d3cd12 100644
--- a/fuzzers/libfuzzer_libmozjpeg/Cargo.toml
+++ b/fuzzers/libfuzzer_libmozjpeg/Cargo.toml
@@ -23,7 +23,6 @@ mimalloc = { version = "*", default-features = false }
 
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
-num_cpus = "1.0"
 
 [lib]
 name = "libfuzzer_libmozjpeg"
diff --git a/fuzzers/libfuzzer_libpng/Cargo.toml b/fuzzers/libfuzzer_libpng/Cargo.toml
index b83d307119..f1c8108f55 100644
--- a/fuzzers/libfuzzer_libpng/Cargo.toml
+++ b/fuzzers/libfuzzer_libpng/Cargo.toml
@@ -19,7 +19,6 @@ debug = true
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
 which = { version = "4.0.2" }
-num_cpus = "1.0"
 
 [dependencies]
 libafl = { path = "../../libafl/", features = ["default"] }
diff --git a/fuzzers/libfuzzer_libpng_accounting/Cargo.toml b/fuzzers/libfuzzer_libpng_accounting/Cargo.toml
index 0b9f519794..618510eee1 100644
--- a/fuzzers/libfuzzer_libpng_accounting/Cargo.toml
+++ b/fuzzers/libfuzzer_libpng_accounting/Cargo.toml
@@ -17,7 +17,6 @@ debug = true
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
 which = { version = "4.0.2" }
-num_cpus = "1.0"
 
 [dependencies]
 libafl = { path = "../../libafl/", features = ["std", "derive", "llmp_compression", "introspection"] }
diff --git a/fuzzers/libfuzzer_libpng_ctx/Cargo.toml b/fuzzers/libfuzzer_libpng_ctx/Cargo.toml
index 834fd1835d..99aa4df38c 100644
--- a/fuzzers/libfuzzer_libpng_ctx/Cargo.toml
+++ b/fuzzers/libfuzzer_libpng_ctx/Cargo.toml
@@ -17,7 +17,6 @@ debug = true
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
 which = { version = "4.0.2" }
-num_cpus = "1.0"
 
 [dependencies]
 libafl = { path = "../../libafl/", features = ["std", "derive", "llmp_compression", "introspection"] }
diff --git a/fuzzers/libfuzzer_libpng_launcher/Cargo.toml b/fuzzers/libfuzzer_libpng_launcher/Cargo.toml
index 6194388bbd..7ddfe5599c 100644
--- a/fuzzers/libfuzzer_libpng_launcher/Cargo.toml
+++ b/fuzzers/libfuzzer_libpng_launcher/Cargo.toml
@@ -17,7 +17,6 @@ debug = true
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
 which = { version = "4.0.2" }
-num_cpus = "1.0"
 
 [dependencies]
 libafl = { path = "../../libafl/", features = ["std", "derive", "llmp_compression", "introspection"] }
diff --git a/fuzzers/libfuzzer_reachability/Cargo.toml b/fuzzers/libfuzzer_reachability/Cargo.toml
index ace305d460..e42a09953f 100644
--- a/fuzzers/libfuzzer_reachability/Cargo.toml
+++ b/fuzzers/libfuzzer_reachability/Cargo.toml
@@ -17,7 +17,6 @@ debug = true
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
 which = { version = "4.0.2" }
-num_cpus = "1.0"
 
 [dependencies]
 libafl = { path = "../../libafl/" }
diff --git a/fuzzers/libfuzzer_stb_image/Cargo.toml b/fuzzers/libfuzzer_stb_image/Cargo.toml
index ed9abf9ac2..517f27255b 100644
--- a/fuzzers/libfuzzer_stb_image/Cargo.toml
+++ b/fuzzers/libfuzzer_stb_image/Cargo.toml
@@ -21,5 +21,4 @@ libafl_targets = { path = "../../libafl_targets/", features = ["sancov_pcguard_e
 mimalloc = { version = "*", default-features = false }
 
 [build-dependencies]
-cc = { version = "1.0", features = ["parallel"] }
-num_cpus = "1.0"
+cc = { version = "1.0", features = ["parallel"] }
\ No newline at end of file
diff --git a/fuzzers/libfuzzer_stb_image_concolic/fuzzer/Cargo.toml b/fuzzers/libfuzzer_stb_image_concolic/fuzzer/Cargo.toml
index 9d4e50f64e..69af8736cd 100644
--- a/fuzzers/libfuzzer_stb_image_concolic/fuzzer/Cargo.toml
+++ b/fuzzers/libfuzzer_stb_image_concolic/fuzzer/Cargo.toml
@@ -23,7 +23,6 @@ mimalloc = { version = "*", default-features = false }
 
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
-num_cpus = "1.0"
 cmake = "0.1"
 which = "4.1"
 symcc_libafl = {path = "../../../libafl_concolic/symcc_libafl"}
diff --git a/fuzzers/libfuzzer_stb_image_sugar/Cargo.toml b/fuzzers/libfuzzer_stb_image_sugar/Cargo.toml
index d22130ee61..c35a92d101 100644
--- a/fuzzers/libfuzzer_stb_image_sugar/Cargo.toml
+++ b/fuzzers/libfuzzer_stb_image_sugar/Cargo.toml
@@ -24,4 +24,3 @@ mimalloc = { version = "*", default-features = false }
 
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
-num_cpus = "1.0"
diff --git a/fuzzers/tutorial/Cargo.toml b/fuzzers/tutorial/Cargo.toml
index bfa70641f2..6a696d46e1 100644
--- a/fuzzers/tutorial/Cargo.toml
+++ b/fuzzers/tutorial/Cargo.toml
@@ -17,7 +17,6 @@ debug = true
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }
 which = { version = "4.0.2" }
-num_cpus = "1.0"
 
 [dependencies]
 libafl = { path = "../../libafl/", features = ["default", "rand_trait"] }
diff --git a/libafl/Cargo.toml b/libafl/Cargo.toml
index ac61f5e702..888ed8a4f0 100644
--- a/libafl/Cargo.toml
+++ b/libafl/Cargo.toml
@@ -13,7 +13,7 @@ categories = ["development-tools::testing", "emulators", "embedded", "os", "no-s
 
 [features]
 default = ["std", "derive", "llmp_compression", "rand_trait", "fork"]
-std = ["serde_json", "serde_json/std", "hostname", "nix", "serde/std", "bincode", "wait-timeout", "regex", "byteorder", "once_cell", "uuid", "tui_monitor", "ctor", "backtrace", "num_cpus"] # print, env, launcher ... support
+std = ["serde_json", "serde_json/std", "hostname", "nix", "serde/std", "bincode", "wait-timeout", "regex", "byteorder", "once_cell", "uuid", "tui_monitor", "ctor", "backtrace"] # print, env, launcher ... support
 derive = ["libafl_derive"] # provide derive(SerdeAny) macro.
 fork = [] # uses the fork() syscall to spawn children, instead of launching a new command, if supported by the OS (has no effect on Windows, no_std).
 rand_trait = ["rand_core"] # If set, libafl's rand implementations will implement `rand::Rng`
@@ -43,7 +43,6 @@ rustversion = "1.0"
 
 [dev-dependencies]
 serde_json = { version = "1.0", default-features = false, features = ["alloc"] }
-num_cpus = "^1.13.1" # cpu count, for llmp example
 serial_test = "0.8"
 
 [dependencies]
@@ -60,7 +59,6 @@ postcard = { version = "1.0", features = ["alloc"] } # no_std compatible serde s
 bincode = {version = "1.3", optional = true }
 static_assertions = "1.1.0"
 num_enum = { version = "0.5.7", default-features = false }
-num_cpus = { version = "^1.13.1", optional = true }
 typed-builder = "0.10.0" # Implement the builder pattern at compiletime
 ahash = { version = "0.7", default-features=false, features=["compile-time-rng"] } # The hash function already used in hashbrown
 intervaltree = { version = "0.2.7", default-features = false, features = ["serde"] }
diff --git a/libafl/src/bolts/core_affinity.rs b/libafl/src/bolts/core_affinity.rs
index b158fb0085..2dcbc98bf7 100644
--- a/libafl/src/bolts/core_affinity.rs
+++ b/libafl/src/bolts/core_affinity.rs
@@ -518,6 +518,7 @@ fn set_for_current_helper(core_id: CoreId) -> Result<(), Error> {
 #[cfg(target_vendor = "apple")]
 mod apple {
     use core::ptr::addr_of_mut;
+    use std::thread::available_parallelism;
 
     use crate::Error;
 
@@ -528,7 +529,6 @@ mod apple {
         thread_policy_flavor_t, thread_policy_t, thread_t, KERN_NOT_SUPPORTED, KERN_SUCCESS,
         THREAD_AFFINITY_POLICY, THREAD_AFFINITY_POLICY_COUNT,
     };
-    use num_cpus;
 
     #[repr(C)]
     struct thread_affinity_policy_data_t {
@@ -547,7 +547,7 @@ mod apple {
 
     #[allow(clippy::unnecessary_wraps)]
     pub fn get_core_ids() -> Result<Vec<CoreId>, Error> {
-        Ok((0..(num_cpus::get()))
+        Ok((0..(usize::from(available_parallelism()?)))
             .into_iter()
             .map(|n| CoreId { id: n })
             .collect::<Vec<_>>())
@@ -591,18 +591,14 @@ mod apple {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
+    use std::thread::available_parallelism;
 
-    // #[test]
-    // fn test_num_cpus() {
-    //     println!("Num CPUs: {}", num_cpus::get());
-    //     println!("Num Physical CPUs: {}", num_cpus::get_physical());
-    // }
+    use super::*;
 
     #[test]
     fn test_get_core_ids() {
         let set = get_core_ids().unwrap();
-        assert_eq!(set.len(), num_cpus::get());
+        assert_eq!(set.len(), usize::from(available_parallelism().unwrap()));
     }
 
     #[test]