diff --git a/tests/Plivo.Test/packages.config b/tests/Plivo.Test/packages.config
old mode 100755
new mode 100644
index 6ca421f8..7a3ea96d
--- a/tests/Plivo.Test/packages.config
+++ b/tests/Plivo.Test/packages.config
@@ -11,7 +11,7 @@
   <package id="NUnit.Extension.VSProjectLoader" version="3.8.0" targetFramework="net461" />
   <package id="NUnit.Runners" version="3.9.0" targetFramework="net461" />
   <package id="NUnit3TestAdapter" version="3.11.2" targetFramework="net461" />
-  <package id="System.Net.Http" version="4.3.1" targetFramework="net461" />
+  <package id="System.Net.Http" version="4.3.4" targetFramework="net461" />
   <package id="System.Security.Cryptography.Algorithms" version="4.3.0" targetFramework="net461" />
   <package id="System.Security.Cryptography.Encoding" version="4.3.0" targetFramework="net461" />
   <package id="System.Security.Cryptography.Primitives" version="4.3.0" targetFramework="net461" />