diff --git a/README.md b/README.md
index e2628b16..8c198076 100644
--- a/README.md
+++ b/README.md
@@ -617,7 +617,7 @@ The input must be valid UTF-8.
 
 orjson maintains a cache of map keys for the duration of the process. This
 causes a net reduction in memory usage by avoiding duplicate strings. The
-keys must be at most 64 bytes to be cached and 1024 entries are stored.
+keys must be at most 64 bytes to be cached and 2048 entries are stored.
 
 The global interpreter lock (GIL) is held for the duration of the call.
 
diff --git a/src/deserialize/cache.rs b/src/deserialize/cache.rs
index 0e3111dd..6653a34c 100644
--- a/src/deserialize/cache.rs
+++ b/src/deserialize/cache.rs
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
-use associative_cache::{AssociativeCache, Capacity1024, HashDirectMapped, RoundRobinReplacement};
+use associative_cache::{AssociativeCache, Capacity2048, HashDirectMapped, RoundRobinReplacement};
 use core::ffi::c_void;
 use once_cell::unsync::OnceCell;
 use std::hash::Hasher;
@@ -34,7 +34,7 @@ impl Drop for CachedKey {
 }
 
 pub type KeyMap =
-    AssociativeCache<u64, CachedKey, Capacity1024, HashDirectMapped, RoundRobinReplacement>;
+    AssociativeCache<u64, CachedKey, Capacity2048, HashDirectMapped, RoundRobinReplacement>;
 
 pub static mut KEY_MAP: OnceCell<KeyMap> = OnceCell::new();