diff --git a/StockMonitor/UnitTestProject/packages.config b/StockMonitor/UnitTestProject/packages.config
index 827a441..7949064 100644
--- a/StockMonitor/UnitTestProject/packages.config
+++ b/StockMonitor/UnitTestProject/packages.config
@@ -2,7 +2,7 @@
 <packages>
   <package id="BouncyCastle" version="1.8.6.1" targetFramework="net48" />
   <package id="EntityFramework" version="6.4.0" targetFramework="net48" />
-  <package id="Google.Protobuf" version="3.11.4" targetFramework="net48" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net48" />
   <package id="Microsoft.Bcl.AsyncInterfaces" version="1.1.0" targetFramework="net48" />
   <package id="Microsoft.Bcl.HashCode" version="1.1.0" targetFramework="net48" />
   <package id="Microsoft.EntityFrameworkCore" version="3.1.3" targetFramework="net48" />