diff --git a/DataMasker/packages.config b/DataMasker/packages.config
index 3f95443..439de6f 100644
--- a/DataMasker/packages.config
+++ b/DataMasker/packages.config
@@ -15,7 +15,7 @@
   <package id="GeoAPI" version="1.7.5" targetFramework="net461" />
   <package id="GeoAPI.CoordinateSystems" version="1.7.5" targetFramework="net461" />
   <package id="GeoAPI.Core" version="1.7.5" targetFramework="net461" />
-  <package id="Google.Protobuf" version="3.6.1" targetFramework="net461" />
+  <package id="Google.Protobuf" version="3.15.0" targetFramework="net461" />
   <package id="Microsoft.Bcl.AsyncInterfaces" version="1.0.0" targetFramework="net461" />
   <package id="Microsoft.CSharp" version="4.6.0" targetFramework="net461" />
   <package id="Microsoft.Exchange.WebServices" version="2.2" targetFramework="net461" />