diff --git a/02_Windows_App/Perun_v1/00_Config/packages.config b/02_Windows_App/Perun_v1/00_Config/packages.config
index 18cf35a..f52f85d 100644
--- a/02_Windows_App/Perun_v1/00_Config/packages.config
+++ b/02_Windows_App/Perun_v1/00_Config/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.5.1" targetFramework="net461" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net461" />
   <package id="MySql.Data" version="8.0.15" targetFramework="net461" />
   <package id="Newtonsoft.Json" version="12.0.1" targetFramework="net461" />
 </packages>
\ No newline at end of file