diff --git a/columnq/src/columnq.rs b/columnq/src/columnq.rs
index c799129..cdb99e4 100644
--- a/columnq/src/columnq.rs
+++ b/columnq/src/columnq.rs
@@ -36,13 +36,6 @@ impl ColumnQ {
         &self.schema_map
     }
 
-    pub fn serializable_schema_map(&self) -> HashMap<&String, &arrow::datatypes::Schema> {
-        self.schema_map
-            .iter()
-            .map(|(k, v)| (k, v.as_ref()))
-            .collect()
-    }
-
     pub async fn query_graphql(
         &self,
         query: &str,
diff --git a/roapi-http/Cargo.toml b/roapi-http/Cargo.toml
index 80ffe72..05ae2f5 100644
--- a/roapi-http/Cargo.toml
+++ b/roapi-http/Cargo.toml
@@ -30,7 +30,7 @@ pin-project = "1"
 
 env_logger = "0"
 log = "0"
-serde = "1"
+serde = { version = "1", features = ["rc"] }
 serde_json = "1"
 serde_derive = "1"
 serde_yaml = "0.8"
diff --git a/roapi-http/src/api/schema.rs b/roapi-http/src/api/schema.rs
index d29af60..aa0febc 100644
--- a/roapi-http/src/api/schema.rs
+++ b/roapi-http/src/api/schema.rs
@@ -8,7 +8,7 @@ pub async fn schema(
     state: extract::Extension<Arc<HandlerContext>>,
 ) -> Result<impl IntoResponse, ApiErrResp> {
     let ctx = state.0;
-    let schema = ctx.cq.serializable_schema_map();
+    let schema = ctx.cq.schema_map();
     let payload = serde_json::to_vec(&schema)
         .map_err(columnq::error::ColumnQError::from)
         .map_err(ApiErrResp::json_serialization)?;
@@ -22,9 +22,10 @@ pub async fn get_by_table_name(
     let ctx = state.0;
     let payload = serde_json::to_vec(
         ctx.cq
-            .serializable_schema_map()
+            .schema_map()
             .get(&table_name)
-            .ok_or_else(|| ApiErrResp::not_found("invalid table name"))?,
+            .ok_or_else(|| ApiErrResp::not_found("invalid table name"))?
+            .as_ref(),
     )
     .map_err(columnq::error::ColumnQError::from)
     .map_err(ApiErrResp::json_serialization)?;