diff --git a/crates/prover/src/core/backend/cpu/grind.rs b/crates/prover/src/core/backend/cpu/grind.rs
index 9ca424861..2eef4bbc9 100644
--- a/crates/prover/src/core/backend/cpu/grind.rs
+++ b/crates/prover/src/core/backend/cpu/grind.rs
@@ -1,18 +1,35 @@
+#[cfg(feature = "parallel")]
+use rayon::prelude::*;
+
 use super::CpuBackend;
 use crate::core::channel::Channel;
 use crate::core::proof_of_work::GrindOps;
 
-impl<C: Channel> GrindOps<C> for CpuBackend {
+impl<C> GrindOps<C> for CpuBackend
+where
+    C: Channel + std::marker::Sync,
+{
     fn grind(channel: &C, pow_bits: u32) -> u64 {
         // TODO(spapini): This is a naive implementation. Optimize it.
-        let mut nonce = 0;
-        loop {
+
+        let check_nonce = |nonce: &u64| {
             let mut channel = channel.clone();
-            channel.mix_u64(nonce);
-            if channel.trailing_zeros() >= pow_bits {
-                return nonce;
+            channel.mix_u64(*nonce);
+            channel.trailing_zeros() >= pow_bits
+        };
+
+        {
+            let range = 0..u64::MAX;
+            #[cfg(not(feature = "parallel"))]
+            {
+                range.into_iter().find(check_nonce)
+            }
+
+            #[cfg(feature = "parallel")]
+            {
+                range.into_par_iter().find_any(check_nonce)
             }
-            nonce += 1;
         }
+        .expect("Grind failed to find a solution.")
     }
 }