diff --git a/src/eth/state.yaml b/src/eth/state.yaml
index 4b62c1ee..83d2fb22 100644
--- a/src/eth/state.yaml
+++ b/src/eth/state.yaml
@@ -23,7 +23,7 @@
     - name: Storage slot
       required: true
       schema:
-        $ref: '#/components/schemas/uint256'
+        $ref: '#/components/schemas/bytesMax32'
     - name: Block
       required: false
       schema:
@@ -31,7 +31,7 @@
   result:
     name: Value
     schema:
-      $ref: '#/components/schemas/bytes'
+      $ref: '#/components/schemas/bytes32'
 - name: eth_getTransactionCount
   summary: Returns the number of transactions sent from an address.
   params:
diff --git a/src/schemas/base-types.yaml b/src/schemas/base-types.yaml
index f301e2bf..da755115 100644
--- a/src/schemas/base-types.yaml
+++ b/src/schemas/base-types.yaml
@@ -55,7 +55,7 @@ uint64:
 uint256:
   title: hex encoded 256 bit unsigned integer
   type: string
-  pattern: ^0x([1-9a-f]+[0-9a-f]{0,31})|0$
+  pattern: ^0x([1-9a-f]+[0-9a-f]{0,63})|0$
 hash32:
   title: 32 byte hex value
   type: string