diff --git a/crates/builder-api/src/lib.rs b/crates/builder-api/src/lib.rs
index d273528191..d1714c2705 100644
--- a/crates/builder-api/src/lib.rs
+++ b/crates/builder-api/src/lib.rs
@@ -10,4 +10,4 @@ pub mod v0_2 {
     pub use super::v0_1::*;
     pub type Version = vbs::version::StaticVersion<0, 2>;
 }
-pub mod v0_3;
+pub mod v0_99;
diff --git a/crates/builder-api/src/v0_3/builder.rs b/crates/builder-api/src/v0_99/builder.rs
similarity index 100%
rename from crates/builder-api/src/v0_3/builder.rs
rename to crates/builder-api/src/v0_99/builder.rs
diff --git a/crates/builder-api/src/v0_3/data_source.rs b/crates/builder-api/src/v0_99/data_source.rs
similarity index 100%
rename from crates/builder-api/src/v0_3/data_source.rs
rename to crates/builder-api/src/v0_99/data_source.rs
diff --git a/crates/builder-api/src/v0_3/mod.rs b/crates/builder-api/src/v0_99/mod.rs
similarity index 64%
rename from crates/builder-api/src/v0_3/mod.rs
rename to crates/builder-api/src/v0_99/mod.rs
index b691543cb9..29691d0c26 100644
--- a/crates/builder-api/src/v0_3/mod.rs
+++ b/crates/builder-api/src/v0_99/mod.rs
@@ -3,4 +3,4 @@ pub mod data_source;
 /// No changes to this module
 pub use super::v0_1::query_data;
 
-pub type Version = vbs::version::StaticVersion<0, 3>;
+pub type Version = vbs::version::StaticVersion<0, 99>;
diff --git a/crates/task-impls/src/builder.rs b/crates/task-impls/src/builder.rs
index 330f5200d6..0372209c3f 100644
--- a/crates/task-impls/src/builder.rs
+++ b/crates/task-impls/src/builder.rs
@@ -224,8 +224,8 @@ pub mod v0_2 {
 }
 
 /// Version 0.3: marketplace. Bundles.
-pub mod v0_3 {
-    pub use hotshot_builder_api::v0_3::Version;
+pub mod v0_99 {
+    pub use hotshot_builder_api::v0_99::Version;
     use hotshot_types::{
         bundle::Bundle, constants::MARKETPLACE_BUILDER_MODULE,
         traits::node_implementation::NodeType, vid::VidCommitment,
@@ -235,7 +235,7 @@ pub mod v0_3 {
     pub use super::BuilderClientError;
 
     /// Client for builder API
-    pub type BuilderClient<TYPES> = super::BuilderClient<TYPES, StaticVersion<0, 3>>;
+    pub type BuilderClient<TYPES> = super::BuilderClient<TYPES, StaticVersion<0, 99>>;
 
     impl<TYPES: NodeType> BuilderClient<TYPES> {
         /// Claim block
diff --git a/crates/task-impls/src/transactions.rs b/crates/task-impls/src/transactions.rs
index 7018969e3f..f6da7ffec0 100644
--- a/crates/task-impls/src/transactions.rs
+++ b/crates/task-impls/src/transactions.rs
@@ -39,7 +39,7 @@ use vec1::Vec1;
 
 use crate::{
     builder::{
-        v0_1::BuilderClient as BuilderClientBase, v0_3::BuilderClient as BuilderClientMarketplace,
+        v0_1::BuilderClient as BuilderClientBase, v0_99::BuilderClient as BuilderClientMarketplace,
     },
     events::{HotShotEvent, HotShotTaskCompleted},
     helpers::broadcast_event,
diff --git a/crates/testing/src/block_builder/mod.rs b/crates/testing/src/block_builder/mod.rs
index a488b96dab..45b8f07461 100644
--- a/crates/testing/src/block_builder/mod.rs
+++ b/crates/testing/src/block_builder/mod.rs
@@ -17,7 +17,7 @@ use hotshot_builder_api::{
         block_info::{AvailableBlockData, AvailableBlockHeaderInput, AvailableBlockInfo},
         builder::{Error, Options},
     },
-    v0_3,
+    v0_99,
 };
 use hotshot_types::{
     constants::{LEGACY_BUILDER_MODULE, MARKETPLACE_BUILDER_MODULE},
@@ -84,7 +84,7 @@ pub fn run_builder_source<TYPES, Source>(
     <Source as ReadState>::State: Sync
         + Send
         + v0_1::data_source::BuilderDataSource<TYPES>
-        + v0_3::data_source::BuilderDataSource<TYPES>,
+        + v0_99::data_source::BuilderDataSource<TYPES>,
 {
     spawn(async move {
         let start_builder = |url: Url, source: Source| -> _ {
@@ -92,7 +92,7 @@ pub fn run_builder_source<TYPES, Source>(
                 &Options::default(),
             )
             .expect("Failed to construct the builder API");
-            let builder_api_0_3 = hotshot_builder_api::v0_3::builder::define_api::<Source, TYPES>(
+            let builder_api_0_3 = hotshot_builder_api::v0_99::builder::define_api::<Source, TYPES>(
                 &Options::default(),
             )
             .expect("Failed to construct the builder API");
diff --git a/crates/testing/src/block_builder/simple.rs b/crates/testing/src/block_builder/simple.rs
index e490d8c598..8376633afc 100644
--- a/crates/testing/src/block_builder/simple.rs
+++ b/crates/testing/src/block_builder/simple.rs
@@ -29,7 +29,7 @@ use hotshot_builder_api::{
         block_info::{AvailableBlockData, AvailableBlockHeaderInput, AvailableBlockInfo},
         builder::{BuildError, Error, Options},
     },
-    v0_3,
+    v0_99,
 };
 use hotshot_types::{
     bundle::Bundle,
@@ -132,7 +132,7 @@ impl<TYPES: NodeType> ReadState for SimpleBuilderSource<TYPES> {
 }
 
 #[async_trait]
-impl<TYPES: NodeType> v0_3::data_source::BuilderDataSource<TYPES> for SimpleBuilderSource<TYPES>
+impl<TYPES: NodeType> v0_99::data_source::BuilderDataSource<TYPES> for SimpleBuilderSource<TYPES>
 where
     <TYPES as NodeType>::InstanceState: Default,
 {
@@ -342,7 +342,7 @@ impl<TYPES: NodeType> SimpleBuilderSource<TYPES> {
         >(&Options::default())
         .expect("Failed to construct the builder API");
 
-        let builder_api_0_3 = hotshot_builder_api::v0_3::builder::define_api::<
+        let builder_api_0_3 = hotshot_builder_api::v0_99::builder::define_api::<
             SimpleBuilderSource<TYPES>,
             TYPES,
         >(&Options::default())