diff --git a/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix b/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
index 62956e1e46de..eff1cef578e5 100644
--- a/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
+++ b/pkgs/development/python-modules/google-cloud-bigquery-datatransfer/default.nix
@@ -6,6 +6,7 @@
 , proto-plus
 , pytestCheckHook
 , pytest-asyncio
+, pytz
 , mock
 }:
 
@@ -18,7 +19,7 @@ buildPythonPackage rec {
     sha256 = "fcb71ebe5c5b232d24fe7d666b65709e4fc8db43263c8182e5ed8e5a52abefec";
   };
 
-  propagatedBuildInputs = [ google-api-core libcst proto-plus ];
+  propagatedBuildInputs = [ google-api-core libcst proto-plus pytz ];
   checkInputs = [ mock pytestCheckHook pytest-asyncio ];
 
   pythonImportsCheck = [
diff --git a/pkgs/development/python-modules/proto-plus/default.nix b/pkgs/development/python-modules/proto-plus/default.nix
index df97d1c4d780..e623840f1c65 100644
--- a/pkgs/development/python-modules/proto-plus/default.nix
+++ b/pkgs/development/python-modules/proto-plus/default.nix
@@ -10,12 +10,12 @@
 
 buildPythonPackage rec {
   pname = "proto-plus";
-  version = "1.19.0";
+  version = "1.19.2";
   disabled = !isPy3k;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-zmaVzoBDg61vOSxLsYdMMjiWKQofZWVg3jZBa6gy2R4=";
+    sha256 = "sha256-ylMLBxjGJbpj8VGrP83INrWTQ9FJt9/RXsLc6zhEwi0=";
   };
 
   propagatedBuildInputs = [ protobuf ];