diff --git a/crates/primitives/src/block/header.rs b/crates/primitives/src/block/header.rs
index bbf0d5ab..249ce349 100644
--- a/crates/primitives/src/block/header.rs
+++ b/crates/primitives/src/block/header.rs
@@ -439,7 +439,7 @@ pub struct MMRDataFromIndexer {
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct MMRMetaFromIndexer {
-    pub mmr_id: u64,
+    pub mmr_id: String,
     pub mmr_peaks: Vec<String>,
     pub mmr_root: String,
     pub mmr_size: u64,
@@ -470,7 +470,7 @@ pub struct MMRDataFromNewIndexer {
 
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
 pub struct MMRMetaFromNewIndexer {
-    pub mmr_id: u64,
+    pub mmr_id: String,
     pub mmr_peaks: Vec<String>,
     pub mmr_root: String,
     pub mmr_size: u64,
diff --git a/crates/primitives/src/processed_types/mmr.rs b/crates/primitives/src/processed_types/mmr.rs
index a0b8fbe5..31454007 100644
--- a/crates/primitives/src/processed_types/mmr.rs
+++ b/crates/primitives/src/processed_types/mmr.rs
@@ -1,6 +1,6 @@
 use serde::{Deserialize, Serialize};
 
-use crate::block::header::MMRMetaFromNewIndexer;
+use crate::{block::header::MMRMetaFromNewIndexer, utils::hex_string_to_uint};
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize, Eq, Hash)]
 pub struct MMRMeta {
@@ -24,21 +24,10 @@ impl MMRMeta {
     }
 }
 
-impl From<MMRMeta> for MMRMetaFromNewIndexer {
-    fn from(val: MMRMeta) -> Self {
-        MMRMetaFromNewIndexer {
-            mmr_id: val.id,
-            mmr_root: val.root,
-            mmr_size: val.size,
-            mmr_peaks: val.peaks,
-        }
-    }
-}
-
 impl MMRMeta {
     pub fn from_indexer(val: MMRMetaFromNewIndexer, chain_id: u64) -> Self {
         MMRMeta {
-            id: val.mmr_id,
+            id: hex_string_to_uint(&val.mmr_id),
             root: val.mmr_root,
             size: val.mmr_size,
             peaks: val.mmr_peaks,
diff --git a/crates/primitives/src/utils.rs b/crates/primitives/src/utils.rs
index fe2eddbd..e6a1711e 100644
--- a/crates/primitives/src/utils.rs
+++ b/crates/primitives/src/utils.rs
@@ -44,6 +44,11 @@ pub fn tx_index_to_tx_key(tx_index: u64) -> String {
     format!("0x{}", hex::encode(binding))
 }
 
+pub fn hex_string_to_uint(hex_string: &str) -> u64 {
+    let hex_string = hex_string.trim_start_matches("0x");
+    u64::from_str_radix(hex_string, 16).expect("Cannot convert hex string to uint")
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -122,4 +127,11 @@ mod tests {
 
         assert_eq!(tx_key, expected_tx_key);
     }
+
+    #[test]
+    fn test_hex_string_to_uint() {
+        let hex_string = "0x1b";
+        let result = hex_string_to_uint(hex_string);
+        assert_eq!(result, 27);
+    }
 }