diff --git a/SimpleDatabase/packages.config b/SimpleDatabase/packages.config
index a8b25a9..12385a9 100644
--- a/SimpleDatabase/packages.config
+++ b/SimpleDatabase/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.5.1" targetFramework="net452" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net452" />
   <package id="Microsoft.CodeAnalysis.FxCopAnalyzers" version="2.9.6" targetFramework="net452" developmentDependency="true" />
   <package id="Microsoft.CodeAnalysis.VersionCheckAnalyzer" version="2.9.6" targetFramework="net452" developmentDependency="true" />
   <package id="Microsoft.CodeQuality.Analyzers" version="2.9.6" targetFramework="net452" developmentDependency="true" />