diff --git a/flix.toml b/flix.toml
index 2ccdfe6..34db9dc 100644
--- a/flix.toml
+++ b/flix.toml
@@ -7,4 +7,4 @@ authors     = ["Valentin Erokhin <hello@valentin.wiki>"]
 repository = "github:saviorand/flixapi"
 
 [dependencies]
-"github:mlutze/flix-json" = "0.12.19"
\ No newline at end of file
+"github:mlutze/flix-json" = "0.13.1"
\ No newline at end of file
diff --git a/src/OpenApi.flix b/src/OpenApi.flix
index 1e2c849..f2d2e82 100644
--- a/src/OpenApi.flix
+++ b/src/OpenApi.flix
@@ -229,7 +229,7 @@ mod OpenApi {
         baseOp
         |> insertOptional("summary", m#summary |> Option.map(JsonString))
         |> insertOptional("description", m#description |> Option.map(JsonString))
-        |> insertOptional("tags", if (List.isEmpty(m#tags)) None else Some(JsonArray(List.map(JsonString, m#tags))))
+        |> insertOptional("tags", if (List.isEmpty(m#tags)) None else Some(JsonArray(Vector.map(JsonString, m#tags |> List.toVector))))
         |> addRequestBodyIfNeeded(method, m#requestBodyDescription, m#requestSchema)
         |> addPathParametersIfNeeded(path)
         |> JsonObject
@@ -276,7 +276,7 @@ mod OpenApi {
         if (List.isEmpty(pathParams)) {
             m
         } else {
-            let paramArray = pathParams |> List.map(paramName -> JsonObject(Map#{
+            let paramArray = pathParams |> List.toVector |> Vector.map(paramName -> JsonObject(Map#{
                 "name" => JsonString(paramName),
                 "in" => JsonString("path"),
                 "required" => JsonBool(true),