diff --git a/crates/connectors/ndc-postgres/src/schema/mutation/v1.rs b/crates/connectors/ndc-postgres/src/schema/mutation/v1.rs
index b6b13861..3258f98a 100644
--- a/crates/connectors/ndc-postgres/src/schema/mutation/v1.rs
+++ b/crates/connectors/ndc-postgres/src/schema/mutation/v1.rs
@@ -35,7 +35,7 @@ pub fn delete_to_procedure(
 
             make_procedure_type(
                 name.clone(),
-                Some(description.to_string()),
+                Some(description.clone()),
                 arguments,
                 models::Type::Named {
                     name: collection_name.as_str().into(),
@@ -71,7 +71,7 @@ pub fn insert_to_procedure(
 
     make_procedure_type(
         name.clone(),
-        Some(insert.description.to_string()),
+        Some(insert.description.clone()),
         arguments,
         models::Type::Named {
             name: insert.collection_name.as_str().into(),
diff --git a/crates/connectors/ndc-postgres/src/schema/mutation/v2.rs b/crates/connectors/ndc-postgres/src/schema/mutation/v2.rs
index e7435bb6..27582ef2 100644
--- a/crates/connectors/ndc-postgres/src/schema/mutation/v2.rs
+++ b/crates/connectors/ndc-postgres/src/schema/mutation/v2.rs
@@ -44,7 +44,7 @@ pub fn delete_to_procedure(
 
     make_procedure_type(
         name.clone(),
-        Some(delete_by_key.description.to_string()),
+        Some(delete_by_key.description.clone()),
         arguments,
         models::Type::Named {
             name: delete_by_key.collection_name.as_str().into(),
@@ -173,7 +173,7 @@ pub fn update_to_procedure(
     // Make a type for the procedure.
     make_procedure_type(
         procedure_name.clone(),
-        Some(update_by_key.description.to_string()),
+        Some(update_by_key.description.clone()),
         arguments,
         models::Type::Named {
             name: update_by_key.collection_name.as_str().into(),
@@ -221,7 +221,7 @@ pub fn insert_to_procedure(
 
     make_procedure_type(
         name.clone(),
-        Some(insert.description.to_string()),
+        Some(insert.description.clone()),
         arguments,
         models::Type::Named {
             name: insert.collection_name.as_str().into(),
diff --git a/crates/query-engine/execution/src/query.rs b/crates/query-engine/execution/src/query.rs
index ecf60612..3186e355 100644
--- a/crates/query-engine/execution/src/query.rs
+++ b/crates/query-engine/execution/src/query.rs
@@ -229,7 +229,7 @@ fn build_query_with_params<'a>(
                 if var == sql::helpers::VARIABLES_OBJECT_PLACEHOLDER =>
             {
                 match &variables {
-                    None => Err(Error::Query(QueryError::VariableNotFound(var.to_string()))),
+                    None => Err(Error::Query(QueryError::VariableNotFound(var.clone()))),
                     Some(variables) => {
                         let vars = variables_to_json(variables)?;
                         Ok(sqlx_query.bind(vars))
@@ -237,7 +237,7 @@ fn build_query_with_params<'a>(
                 }
             }
             sql::string::Param::Variable(var) => {
-                Err(Error::Query(QueryError::VariableNotFound(var.to_string())))
+                Err(Error::Query(QueryError::VariableNotFound(var.clone())))
             }
         })
 }
diff --git a/crates/query-engine/translation/src/translation/query/values.rs b/crates/query-engine/translation/src/translation/query/values.rs
index 9da8badd..97a8c812 100644
--- a/crates/query-engine/translation/src/translation/query/values.rs
+++ b/crates/query-engine/translation/src/translation/query/values.rs
@@ -95,7 +95,7 @@ pub(crate) fn type_to_ast_scalar_type_name(
             Ok(if let Some(schema_name) = type_info.schema_name() {
                 sql::ast::ScalarTypeName::Qualified {
                     type_name,
-                    schema_name: sql::ast::SchemaName(schema_name.to_string()),
+                    schema_name: sql::ast::SchemaName(schema_name.clone()),
                 }
             } else {
                 sql::ast::ScalarTypeName::Unqualified(type_name)
diff --git a/flake.lock b/flake.lock
index 1e472e23..55742fe2 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "crane": {
       "locked": {
-        "lastModified": 1760924934,
-        "narHash": "sha256-tuuqY5aU7cUkR71sO2TraVKK2boYrdW3gCSXUkF4i44=",
+        "lastModified": 1763938834,
+        "narHash": "sha256-j8iB0Yr4zAvQLueCZ5abxfk6fnG/SJ5JnGUziETjwfg=",
         "owner": "ipetkov",
         "repo": "crane",
-        "rev": "c6b4d5308293d0d04fcfeee92705017537cad02f",
+        "rev": "d9e753122e51cee64eb8d2dddfe11148f339f5a2",
         "type": "github"
       },
       "original": {
@@ -35,11 +35,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1761035388,
-        "narHash": "sha256-ZlMGyS8x6BjJGPDL8jz5v2MAj8NTeIo9ywROkHCKTzE=",
+        "lastModified": 1763999649,
+        "narHash": "sha256-TBLzlyxB8pgEXCfSjKLkNgaR4FOf3HyIa/o8yIjeMvI=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "3c3988cce18bf31db263dd0374e34cb65e696def",
+        "rev": "ab78f0660563a98dd104bd744ad30b2f6af348f6",
         "type": "github"
       },
       "original": {
@@ -63,11 +63,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1761014195,
-        "narHash": "sha256-PlIZkwQM0an4ptA7vEC39ZlJcXPxqtKWtsRCwKz3I4w=",
+        "lastModified": 1763952169,
+        "narHash": "sha256-+PeDBD8P+NKauH+w7eO/QWCIp8Cx4mCfWnh9sJmy9CM=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "f34ca7f18bd13e9f4487b0bff3017d3188f21904",
+        "rev": "ab726555a9a72e6dc80649809147823a813fa95b",
         "type": "github"
       },
       "original": {
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 988f4f1f..69c06f57 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,4 +1,4 @@
 [toolchain]
-channel = "1.90.0"
+channel = "1.91.1"
 profile = "default"  # see https://rust-lang.github.io/rustup/concepts/profiles.html
 components = ["rust-analyzer", "rust-src"]  # see https://rust-lang.github.io/rustup/concepts/components.html