diff --git a/idl/openbook_v2.json b/idl/openbook_v2.json
index 52df966b0..abf3c9842 100644
--- a/idl/openbook_v2.json
+++ b/idl/openbook_v2.json
@@ -3263,7 +3263,7 @@
         },
         {
           "name": "makerFee",
-          "type": "i64",
+          "type": "u64",
           "index": false
         },
         {
@@ -3282,8 +3282,8 @@
           "index": false
         },
         {
-          "name": "takerFee",
-          "type": "i64",
+          "name": "takerFeeCeil",
+          "type": "u64",
           "index": false
         },
         {
diff --git a/ts/client/src/openbook_v2.ts b/ts/client/src/openbook_v2.ts
index 4e1509dad..e83a7aa72 100644
--- a/ts/client/src/openbook_v2.ts
+++ b/ts/client/src/openbook_v2.ts
@@ -3112,7 +3112,7 @@ export interface OpenbookV2 {
         },
         {
           name: 'makerFee';
-          type: 'i64';
+          type: 'u64';
           index: false;
         },
         {
@@ -3131,8 +3131,8 @@ export interface OpenbookV2 {
           index: false;
         },
         {
-          name: 'takerFee';
-          type: 'i64';
+          name: 'takerFeeCeil';
+          type: 'u64';
           index: false;
         },
         {
@@ -6690,7 +6690,7 @@ export const IDL: OpenbookV2 = {
         },
         {
           name: 'makerFee',
-          type: 'i64',
+          type: 'u64',
           index: false,
         },
         {
@@ -6709,8 +6709,8 @@ export const IDL: OpenbookV2 = {
           index: false,
         },
         {
-          name: 'takerFee',
-          type: 'i64',
+          name: 'takerFeeCeil',
+          type: 'u64',
           index: false,
         },
         {