diff --git a/dojo.h b/dojo.h
index 64e20d2..63c00b1 100644
--- a/dojo.h
+++ b/dojo.h
@@ -503,10 +503,7 @@ typedef enum Primitive_Tag {
   U32,
   U64,
   U128,
-  U256,
-#if defined(TARGET_POINTER_WIDTH_32)
-  U256,
-#endif
+  U256_,
   Bool,
   Felt252,
   ClassHash,
@@ -548,13 +545,8 @@ typedef struct Primitive {
       uint8_t u128[16];
     };
     struct {
-      uint64_t u256[4];
+      struct U256 u256;
     };
-#if defined(TARGET_POINTER_WIDTH_32)
-    struct {
-      uint32_t u256[8];
-    };
-#endif
     struct {
       bool bool_;
     };
@@ -798,7 +790,6 @@ extern "C" {
  *
  * # Parameters
  * * `torii_url` - URL of the Torii server
- * * `rpc_url` - URL of the Starknet RPC endpoint
  * * `libp2p_relay_url` - URL of the libp2p relay server
  * * `world` - World address as a FieldElement
  *
diff --git a/dojo.hpp b/dojo.hpp
index 0331a02..8f2bfae 100644
--- a/dojo.hpp
+++ b/dojo.hpp
@@ -128,6 +128,10 @@ struct Entity {
   CArray<Struct> models;
 };
 
+struct U256 {
+  uint8_t data[32];
+};
+
 struct Primitive {
   enum class Tag {
     I8,
@@ -140,10 +144,7 @@ struct Primitive {
     U32,
     U64,
     U128,
-    U256,
-#if defined(TARGET_POINTER_WIDTH_32)
-    U256,
-#endif
+    U256_,
     Bool,
     Felt252,
     ClassHash,
@@ -191,16 +192,10 @@ struct Primitive {
     uint8_t _0[16];
   };
 
-  struct U256_Body {
-    uint64_t _0[4];
+  struct U256__Body {
+    U256 _0;
   };
 
-#if defined(TARGET_POINTER_WIDTH_32)
-  struct U256_Body {
-    uint32_t _0[8];
-  };
-#endif
-
   struct Bool_Body {
     bool _0;
   };
@@ -233,10 +228,7 @@ struct Primitive {
     U32_Body u32;
     U64_Body u64;
     U128_Body u128;
-    U256_Body u256;
-#if defined(TARGET_POINTER_WIDTH_32)
-    U256_Body u256;
-#endif
+    U256__Body u256;
     Bool_Body bool_;
     Felt252_Body felt252;
     ClassHash_Body class_hash;
@@ -358,33 +350,16 @@ struct Primitive {
     return tag == Tag::U128;
   }
 
-  static Primitive U256(const uint64_t (&_0)[4]) {
-    Primitive result;
-    for (int i = 0; i < 4; i++) {
-      ::new (&result.u256._0[i]) (uint64_t)(_0[i]);
-    }
-    result.tag = Tag::U256;
-    return result;
-  }
-
-  bool IsU256() const {
-    return tag == Tag::U256;
-  }
-
-#if defined(TARGET_POINTER_WIDTH_32)
-  static Primitive U256(const uint32_t (&_0)[8]) {
+  static Primitive U256_(const U256 &_0) {
     Primitive result;
-    for (int i = 0; i < 8; i++) {
-      ::new (&result.u256._0[i]) (uint32_t)(_0[i]);
-    }
-    result.tag = Tag::U256;
+    ::new (&result.u256._0) (U256)(_0);
+    result.tag = Tag::U256_;
     return result;
   }
 
-  bool IsU256() const {
-    return tag == Tag::U256;
+  bool IsU256_() const {
+    return tag == Tag::U256_;
   }
-#endif
 
   static Primitive Bool(const bool &_0) {
     Primitive result;
@@ -592,10 +567,6 @@ struct Event {
   FieldElement transaction_hash;
 };
 
-struct U256 {
-  uint8_t data[32];
-};
-
 struct Token {
   FieldElement contract_address;
   U256 token_id;
@@ -940,7 +911,6 @@ extern "C" {
 ///
 /// # Parameters
 /// * `torii_url` - URL of the Torii server
-/// * `rpc_url` - URL of the Starknet RPC endpoint
 /// * `libp2p_relay_url` - URL of the libp2p relay server
 /// * `world` - World address as a FieldElement
 ///
diff --git a/dojo.pyx b/dojo.pyx
index a645a44..433ceb1 100644
--- a/dojo.pyx
+++ b/dojo.pyx
@@ -322,8 +322,7 @@ cdef extern from *:
     U32,
     U64,
     U128,
-    U256,
-    U256,
+    U256_,
     Bool,
     Felt252,
     ClassHash,
@@ -342,8 +341,7 @@ cdef extern from *:
     uint32_t u32;
     uint64_t u64;
     uint8_t u128[16];
-    uint64_t u256[4];
-    uint32_t u256[8];
+    U256 u256;
     bool bool_;
     FieldElement felt252;
     FieldElement class_hash;
@@ -498,7 +496,6 @@ cdef extern from *:
   #
   # # Parameters
   # * `torii_url` - URL of the Torii server
-  # * `rpc_url` - URL of the Starknet RPC endpoint
   # * `libp2p_relay_url` - URL of the libp2p relay server
   # * `world` - World address as a FieldElement
   #
diff --git a/src/c/mod.rs b/src/c/mod.rs
index 38d7f2d..8ba738c 100644
--- a/src/c/mod.rs
+++ b/src/c/mod.rs
@@ -73,7 +73,6 @@ lazy_static! {
 ///
 /// # Parameters
 /// * `torii_url` - URL of the Torii server
-/// * `rpc_url` - URL of the Starknet RPC endpoint
 /// * `libp2p_relay_url` - URL of the libp2p relay server
 /// * `world` - World address as a FieldElement
 ///
diff --git a/src/c/types.rs b/src/c/types.rs
index 2386730..4aec7f1 100644
--- a/src/c/types.rs
+++ b/src/c/types.rs
@@ -854,10 +854,7 @@ pub enum Primitive {
     U64(u64),
     // TODO: better way?
     U128([u8; 16]),
-    #[cfg(target_pointer_width = "64")]
-    U256([u64; 4]),
-    #[cfg(target_pointer_width = "32")]
-    U256([u32; 8]),
+    U256_(U256),
     Bool(bool),
     Felt252(FieldElement),
     ClassHash(FieldElement),
@@ -882,7 +879,7 @@ impl From<&Primitive> for dojo_types::primitive::Primitive {
             Primitive::U128(v) => {
                 dojo_types::primitive::Primitive::U128(Some(u128::from_be_bytes(*v)))
             }
-            Primitive::U256(v) => dojo_types::primitive::Primitive::U256(Some((*v).into())),
+            Primitive::U256_(v) => dojo_types::primitive::Primitive::U256(Some(v.into())),
             Primitive::Bool(v) => dojo_types::primitive::Primitive::Bool(Some(*v)),
             Primitive::Felt252(v) => {
                 dojo_types::primitive::Primitive::Felt252(Some((&v.clone()).into()))
@@ -927,12 +924,9 @@ impl From<&dojo_types::primitive::Primitive> for Primitive {
             }
             dojo_types::primitive::Primitive::U256(v) => {
                 if let Some(v) = v {
-                    Primitive::U256(v.to_words())
+                    Primitive::U256_(v.into())
                 } else {
-                    #[cfg(target_pointer_width = "64")]
-                    return Primitive::U256([0; 4]);
-                    #[cfg(target_pointer_width = "32")]
-                    return Primitive::U256([0; 8]);
+                    Primitive::U256_(U256 { data: [0; 32] })
                 }
             }
             dojo_types::primitive::Primitive::Bool(v) => Primitive::Bool(v.unwrap_or(false)),