diff --git a/Lightbox/Lightbox/packages.config b/Lightbox/Lightbox/packages.config
index 09ffe26..8204b6c 100644
--- a/Lightbox/Lightbox/packages.config
+++ b/Lightbox/Lightbox/packages.config
@@ -6,7 +6,7 @@
   <package id="EntityFramework" version="6.2.0" targetFramework="net461" />
   <package id="FCTB" version="2.16.24" targetFramework="net461" />
   <package id="FirebirdSql.Data.FirebirdClient" version="7.5.0" targetFramework="net461" />
-  <package id="Google.Protobuf" version="3.6.1" targetFramework="net461" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net461" />
   <package id="IBM.Data.DB2.Core" version="1.3.0.100" targetFramework="net461" />
   <package id="log4net" version="2.0.5" targetFramework="net461" />
   <package id="Microsoft.Bcl.AsyncInterfaces" version="1.0.0" targetFramework="net461" />