diff --git a/src/common/installer/poetryInstaller.ts b/src/common/installer/poetryInstaller.ts
index 4d7add7..34ac95a 100644
--- a/src/common/installer/poetryInstaller.ts
+++ b/src/common/installer/poetryInstaller.ts
@@ -61,7 +61,7 @@ export class PoetryInstaller extends ModuleInstaller implements IModuleInstaller
   protected async getExecutionInfo(moduleName: string, resource?: Uri): Promise<ExecutionInfo> {
     const execPath = this.configurationService.getSettings(resource).poetryPath
     return {
-      args: ['add', moduleName],
+      args: ['add', '--dev', moduleName],
       execPath
     }
   }