diff --git a/Cargo.lock b/Cargo.lock
index de96ae8a07..d2ff4a6248 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3986,6 +3986,15 @@ dependencies = [
  "windows-sys 0.60.2",
 ]
 
+[[package]]
+name = "fixed-cache"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e0b787b8055e984fefc8a6a0709fc800d374dcb2794017799c0f245c75322d4"
+dependencies = [
+ "equivalent",
+]
+
 [[package]]
 name = "fixed-hash"
 version = "0.8.0"
@@ -8243,6 +8252,7 @@ dependencies = [
  "dashmap 6.1.0",
  "derive_more",
  "eyre",
+ "fixed-cache",
  "futures",
  "metrics",
  "metrics-util",
diff --git a/crates/engine/tree/Cargo.toml b/crates/engine/tree/Cargo.toml
index e877c83536..1f353ffce0 100644
--- a/crates/engine/tree/Cargo.toml
+++ b/crates/engine/tree/Cargo.toml
@@ -54,6 +54,7 @@ tokio = { workspace = true, features = ["rt", "rt-multi-thread", "sync", "macros
 mini-moka = { workspace = true, features = ["sync"] }
 moka = { workspace = true, features = ["sync"] }
 smallvec.workspace = true
+fixed-cache = "0.1.1"
 
 # metrics
 metrics.workspace = true
diff --git a/crates/engine/tree/src/tree/precompile_cache.rs b/crates/engine/tree/src/tree/precompile_cache.rs
index 89ee7b8324..2f7cac6f95 100644
--- a/crates/engine/tree/src/tree/precompile_cache.rs
+++ b/crates/engine/tree/src/tree/precompile_cache.rs
@@ -31,7 +31,7 @@ where
 /// Cache for precompiles, for each input stores the result.
 #[derive(Debug, Clone)]
 pub struct PrecompileCache<S>(
-    moka::sync::Cache<Bytes, CacheEntry<S>, alloy_primitives::map::DefaultHashBuilder>,
+    Arc<fixed_cache::Cache<Bytes, CacheEntry<S>, alloy_primitives::map::DefaultHashBuilder>>,
 )
 where
     S: Eq + Hash + std::fmt::Debug + Send + Sync + Clone + 'static;
@@ -41,11 +41,7 @@ where
     S: Eq + Hash + std::fmt::Debug + Send + Sync + Clone + 'static,
 {
     fn default() -> Self {
-        Self(
-            moka::sync::CacheBuilder::new(MAX_CACHE_SIZE as u64)
-                .initial_capacity(MAX_CACHE_SIZE as usize)
-                .build_with_hasher(Default::default()),
-        )
+        Self(Arc::new(fixed_cache::Cache::new(MAX_CACHE_SIZE as usize, Default::default())))
     }
 }
 
@@ -60,7 +56,7 @@ where
     /// Inserts the given key and value into the cache, returning the new cache size.
     fn insert(&self, input: Bytes, value: CacheEntry<S>) -> usize {
         self.0.insert(input, value);
-        self.0.entry_count() as usize
+        MAX_CACHE_SIZE as usize
     }
 }