diff --git a/generate.sh b/generate.sh
index 552f7fc..d0c6acf 100755
--- a/generate.sh
+++ b/generate.sh
@@ -39,6 +39,9 @@ cat patches/2FA_Current_User.rs >> src/models/current_user.rs
 sed -i 's/pub use self::current_user::CurrentUser;/pub use self::current_user::{EitherUserOrTwoFactor, CurrentUser};/g' src/models/mod.rs
 sed -i 's/Result<models::CurrentUser, Error<GetCurrentUserError>>/Result<models::EitherUserOrTwoFactor, Error<GetCurrentUserError>>/g' src/apis/authentication_api.rs
 
+# https://github.com/vrchatapi/vrchatapi-rust/pull/29
+sed -i "s/local_var_req_builder = local_var_req_builder.json(&\(.*\));/if let Some(\1) = \1 { \0 }/g" src/apis/files_api.rs
+
 cargo fmt
 cargo build
 cargo test
diff --git a/src/apis/files_api.rs b/src/apis/files_api.rs
index 09646c8..7648f3d 100644
--- a/src/apis/files_api.rs
+++ b/src/apis/files_api.rs
@@ -104,7 +104,9 @@ pub async fn create_file(
         local_var_req_builder =
             local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
     }
-    local_var_req_builder = local_var_req_builder.json(&create_file_request);
+    if let Some(create_file_request) = create_file_request {
+        local_var_req_builder = local_var_req_builder.json(&create_file_request);
+    }
 
     let local_var_req = local_var_req_builder.build()?;
     let local_var_resp = local_var_client.execute(local_var_req).await?;
@@ -148,7 +150,9 @@ pub async fn create_file_version(
         local_var_req_builder =
             local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
     }
-    local_var_req_builder = local_var_req_builder.json(&create_file_version_request);
+    if let Some(create_file_version_request) = create_file_version_request {
+        local_var_req_builder = local_var_req_builder.json(&create_file_version_request);
+    }
 
     let local_var_req = local_var_req_builder.build()?;
     let local_var_resp = local_var_client.execute(local_var_req).await?;
@@ -326,7 +330,9 @@ pub async fn finish_file_data_upload(
         local_var_req_builder =
             local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
     }
-    local_var_req_builder = local_var_req_builder.json(&finish_file_data_upload_request);
+    if let Some(finish_file_data_upload_request) = finish_file_data_upload_request {
+        local_var_req_builder = local_var_req_builder.json(&finish_file_data_upload_request);
+    }
 
     let local_var_req = local_var_req_builder.build()?;
     let local_var_resp = local_var_client.execute(local_var_req).await?;