diff --git a/packages/cli/api-importers/openapi/openapi-ir-parser/src/openapi/v2/generateIr.ts b/packages/cli/api-importers/openapi/openapi-ir-parser/src/openapi/v2/generateIr.ts
index c630dc4708b..71d3da556ab 100644
--- a/packages/cli/api-importers/openapi/openapi-ir-parser/src/openapi/v2/generateIr.ts
+++ b/packages/cli/api-importers/openapi/openapi-ir-parser/src/openapi/v2/generateIr.ts
@@ -1,10 +1,11 @@
 import { OpenApiIntermediateRepresentation, Source } from "@fern-api/openapi-ir";
 import { TaskContext } from "@fern-api/task-context";
 import { OpenAPIV2 } from "openapi-types";
-import { convertObj } from "swagger2openapi";
 import { ParseOpenAPIOptions } from "../../options";
 import { generateIr as generateIrFromV3 } from "../v3/generateIr";
 
+const isBrowser = typeof window !== "undefined" && typeof window.document !== "undefined";
+
 export async function generateIr({
     openApi,
     taskContext,
@@ -18,7 +19,11 @@ export async function generateIr({
     source: Source;
     namespace: string | undefined;
 }): Promise<OpenApiIntermediateRepresentation> {
-    const conversionResult = await convertObj(openApi, {});
+    if (isBrowser) {
+        throw new Error("Swagger 2.0 is not supported in the browser");
+    }
+    const swagger2openapi = await import("swagger2openapi");
+    const conversionResult = await swagger2openapi.convertObj(openApi, {});
     return generateIrFromV3({
         openApi: conversionResult.openapi,
         taskContext,