diff --git a/json-schema/registry.json b/json-schema/registry.json
index 8106fb45f..fa87039c7 100644
--- a/json-schema/registry.json
+++ b/json-schema/registry.json
@@ -53,6 +53,9 @@
         },
         "all_features": {
           "type": "boolean"
+        },
+        "locked": {
+          "type": "boolean"
         }
       },
       "additionalProperties": false,
diff --git a/pkg/config/registry/cargo.go b/pkg/config/registry/cargo.go
index 5d21a1a0a..d0c6a5c18 100644
--- a/pkg/config/registry/cargo.go
+++ b/pkg/config/registry/cargo.go
@@ -3,4 +3,5 @@ package registry
 type Cargo struct {
 	Features    []string `json:"features,omitempty"`
 	AllFeatures bool     `yaml:"all_features" json:"all_features,omitempty"`
+	Locked      bool     `json:"locked,omitempty"`
 }
diff --git a/pkg/installpackage/cargo.go b/pkg/installpackage/cargo.go
index b21810880..76d4d6d3a 100644
--- a/pkg/installpackage/cargo.go
+++ b/pkg/installpackage/cargo.go
@@ -40,6 +40,9 @@ func getCargoArgs(version string, opts *registry.Cargo) []string {
 		} else if len(opts.Features) != 0 {
 			args = append(args, "--features", strings.Join(opts.Features, ","))
 		}
+		if opts.Locked {
+			args = append(args, "--locked")
+		}
 	}
 	return args
 }