diff --git a/Cargo.lock b/Cargo.lock
index d496ddc..529fa98 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -250,7 +250,7 @@ dependencies = [
 
 [[package]]
 name = "protosol"
-version = "4.0.0"
+version = "4.0.1"
 dependencies = [
  "flatbuffers",
  "flatc-rust",
diff --git a/Cargo.toml b/Cargo.toml
index 0c0b5a4..5e439ec 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "protosol"
-version = "4.0.0"
+version = "4.0.1"
 edition = "2021"
 license = "Apache-2.0"
 description = "Protobuf definitions for the SVM fuzzing project."
diff --git a/proto/txn.proto b/proto/txn.proto
index ee9404e..ff47924 100644
--- a/proto/txn.proto
+++ b/proto/txn.proto
@@ -74,7 +74,7 @@ message TxnBank {
 
   FeatureSet features = 7;
 
-  uint64 epoch = 8;
+  reserved 8;
 }
 
 // This Transaction context be used to fuzz either `load_execute_and_commit_transactions`,